1)  Zenyatta:  Zenyatta's Harmony Orb can be very useful for Winston.  The Harmony Orb can allow Winston to not worry about Leaping to health packs as much and can keep him in the fight more often.  Zenyatta's Harmony Orb tends to be more effective than Lucio's heal aura, and more effective than Mercy's somewhat risky healing support since Winston can freely Leap around while still maintaining the Harmony Orb usually.  Keep in mind that you must keep line of sight with Zenyatta in order to maintain the Harmony Orb on you.

Zenyatta is a very squishy support hero and he is very prone to being flanked, so he can get a lot of use from the protection of a Projected Barrier.  Zenyatta can safely fire his energy orbs and charged volley shots from inside the barrier.  If you see Zenyatta is being flanked or is about to get flanked, then you can Leap up to him and throw down a barrier and take out enemies with the Tesla Cannon.  If it becomes a harsh situation even for Winston, you can activate Primal Rage to knock back enemies around Zenyatta making it easier to survive.

Be mindful which enemy has received Zenyatta's Discord Orb, as that target will receive 50% more damage from all of Zenyatta's allies.  Consider focus on Leaping towards that enemy to take him out, as it should be a higher priority target for you.

Zenyatta's ultimate Transcendence provides Winston and all other allies around Zenyatta a rapid healing effect that enables you to safely get in the front lines to dish out Tesla Cannon damage for a short period of time.  Transcendence is a powerful way to initiate strong pushes towards the enemy.  Winston pairs well with making pushes more successful with Transcendence.  Once the Transcendence is over, you can then throw down a barrier for further protection.  If there is still a lot of enemies left over after Transcendence, Primal Rage can be used to further bat them away from your team to make a push more successful.

2)  Lucio:  Lucio's auras are beneficial for Winston.  Since Winston needs to be in close range to his enemies to deal any damage, Lucio's speed aura helps him to get in range of his enemies more efficiently, allowing him to make it a harder target for his enemies to shoot at.  However, Lucio's heal aura is more important for Winston because his frequent Leaps enable him to get around quickly, so healing is what he will be needing more of.  Heal aura can keep Winston from worrying about Leaping to health packs as often and can help keep him healed up consistently throughout a match.

Lucio's heal aura tends to be more effective than Mercy's healing, as it can be risky for Mercy to support Winston with his wild random Leaps in close range, even with his barriers.  Keep in mind that Lucio's auras only work when you stay within 30 meters of each other and keep line of sight with him as well.

Even though Winston can Leap away from deadly close range enemies (such as Mei, Reinhardt, McCree and Reaper), he can still take advantage of Lucio's Soundwave (knock back) ability to provide another means of keeping those enemies away from you as well.

Lucio's ultimate Sound Barrier can provide Winston and Lucio's allies with a powerful temporary shield that enables Winston to safely go in the front lines for some quick easy damage up close.  Sound Barrier is a powerful ability that enables strong pushes towards the enemy, and Winston pairs well with Sound Barrier to make pushes more successful.  Once the Sound Barrier is over, you can then throw down a barrier for further protection.

3)  Ana:  Winston can sometimes be unsafe for support heroes like Mercy to follow, due to his nature of leaping up close to his enemies.  However, Ana can stand a distance away and heal him up via Biotic Rifle shots.  But Winston is one of the harder tank heroes for Ana to aim Biotic Rifle shots at due to his wild leaps up close to the enemy.

Winston's Barrier Projector can shield attacks away from Ana, possibly even if she is not inside the barrier.  This can allow Ana to keep the Biotic Rifle shots going without delay.

Nano Boosting Winston (Ana's ultimate) is only a mediocre choice.  A Nano Boosted Winston will be annoying to deal with as he will be able to easily catch up to his enemies faster thanks to the increased speed of Nano Boost and will be able to soak up much more damage, providing his role of a tank much more effectively.

Winston's Primal Rage is a decent ultimate to Nano Boost.  Even though Primal Rage's main use is to knock enemies around, Nano Boost will make him much more mobile while using it to bat enemies around much more effectively along with dishing out more damage as well.

Sometimes Ana may not want to worry about healing Winston if his ultimate is ready or nearing ready, as Winston's ultimate Primal Rage heals his HP up completely while also giving him even more HP on top of that.

4)  Mercy:  Mercy's healing beam is incredibly powerful with Winston, but it can be difficult for Mercy to support Winston due to his wild frequent Leaps.  Winston can Leap in dangerous situations for Mercy, but it's not real bad thanks to Winston's Barrier Projectors, as Mercy can be safe for a short period of time under Winston's barrier.

Mercy's damage boosting gets the most use when Winston is attacking multiple enemies at once with the chained lighting effects of his Tesla Cannon, however everything else for Winston is not so effective for damage boosting.  When Winston uses Primal Rage, there is no point in healing Winston since he will get fully healed anyways to 1000 HP.  Damage boosting Primal Rage is only slightly effective since Primal Rage is not really made for dealing damage but rather knocking enemies away.  It can also be difficult for Mercy to keep up with Winston during Primal Rage because his Leap goes on a 2 second cooldown during it.  Mercy is usually better off supporting a different ally during Winston's Primal Rage.

Even though Winston can Leap back to the fight faster after dying, he can still take advantage of Mercy's Resurrect to get back almost instantly.

Even though Mercy can use her Guardian Angel ability to avoid flankers, she can take advantage of Winston's Primal Rage to knock back enemies away from her to help her survive in harsh situations.

5)  Symmetra:  Symmetra's Photon Shield gets little use with Winston.  Since Winston has 500 HP, a 25 HP shield is very small in comparison to his actual hitpoints.  Plus Winston can fully heal himself with Primal Rage and can Leap to health packs quite frequently.  Even though, Photon Shields can still slightly help Winston to withstand a little extra damage while he Leaps around close to his enemies.

Symmetra can put her Sentry Turrets in rooms where health packs are placed at.  This can provide Winston a safe place to Leap to once he gets low on health.  This can also lure enemies into her traps as well.

Symmetra's poor mobility and lack of damage mitigation makes Winston's Barrier Projector very valuable for her.  Winston's Barrier Projector allows Symmetra to safely fire her Photon Orbs while taking cover in the shield globe.

Even though Winston can use his Leap to get back to the fight faster after dying, he still takes great advantage of Symmetra's Teleporter to get back to the fight even faster.

Symmetra is very prone to getting flanked and there is little she can do to protect herself (besides her Projector Beam and Sentry Turrets), she can take advantage of Winston's Primal Rage to bat enemies away from her.

1)  Zarya:  Since Winston tends to Leap into the front lines often to attack his enemies up close, he greatly benefits from Zarya's Projected Barriers, especially during the times when his Barrier Projector (shield globes) are on a cooldown.

Zarya also benefits a lot from Winston's shield globes for protection, especially when her personal Particle Barrier is on a cooldown.  Shield globes can stop enemy fire from hitting Zarya, enabling her shields to regenerate to full HP.

When Zarya uses her ultimate Graviton Surge, Winston's best synergy with it is to simply Leap up towards the clumped up enemies and throw down a Barrier so that the barrier blocks shots from enemies stuck in the surge while using the Tesla Cannon to dish out chain lighting damage to them.  Don't bother using Primal Rage against enemies stuck in a Graviton Surge as it's not very effective for that.

Zarya can be weak against deadly close up enemies such as Mei, Reaper, Reinhardt and McCree.  Primal Rage can be used to bat these enemies away from Zarya to ensure her survival against them.

2)  D.va:  Winston's Barrier Projector (shield globe) can be beneficial for D.va if she is able to get close to the enemy with it, as Fusion Cannons are really only effective in close range.  Since both D.va and Winston can boost/leap up close to the enemy, they can plan a flank together on an enemy and then throw down a Barrier Projector for protection.  D.va can use Defense Matrix while they are boosting/leaping to protect them while they are approaching their destination.  Both D.va and Winston's boost/leap are on relatively short cooldowns, so after successfully flanking an enemy, they can then boost/leap back out to safety or even to another enemy if they have enough health for it.

D.va's ultimate Self-Destruct does have the possibility to pair well with Winston's ultimate Primal Rage.  Primal Rage can knock enemies into the Self-Destruct explosion and preventing them from running away from it by knocking them back into it.  Winston's Leap goes on a 2 second cooldown so he can leap in front of the fleeing enemies and then bat them back into the explosion.

Winston's Barrier Projector works nicely for D.va in human form, allowing her to dish out blaster gun damage from afar safely.

3)  Roadhog:  Winston's Barrier Projector is very beneficial for Roadhog to take cover from and fire Scrap Gun shots along with allowing him to throw out his Chain Hooks safely.  Winston also has the capability to Leap towards Roadhog when in need to quickly throw down a Barrier Projector for protection.  Barrier Projectors can also enable Roadhog to safely use his Take a Breather ability (as normally Roadhog is vulnerable while using it because he is stunlocked for a second).

Both Winston and Roadhog's ultimates have similar uses, they are both used to knock people away (but with not so much damage).  Besides providing double the knock back power, there isn't too many synergies between the two ultimates.  Although Winston can put down a Barrier Projector to protect Roadhog while using Whole Hog, which is very effective because Roadhog is normally vulnerable while using it.

4)  Winston:  Double Winston happens to be somewhat popular in the competitive scene and the reason why is because two Winstons can Leap to the same target (or a ground of bunched up targets) and the landings from the two Leaping Winstons will do twice the damage (100 total in an AOE), and then the chain lighting from both Winston's can do amazing DPS while keeping outside enemies from attacking them with a Barrier Projector.  Once one Barrier Projector gets destroyed, the other Winston puts his other Barrier Projector down.  This strategy tends to be effective and gets great use in the competitive scene.

Also, space out your Barrier Projectors, don't just put yours down on top of the other Winston's as you will be wasting its potential.

5)  Reinhardt:  Reinhardt has a shield that has similar purposes as Winston's Barrier Projector (shield globes).  Although Reinhardt plays differently than Winston, as Reinhardt is able to move with it (but unable to attack with it) and instead of leaping, Reinhardt charges at his enemies and then attacks in close range with his Rocket Hammer.  When Reinhardt charges towards a bunch of enemies, Winston can then Leap after him and then put down a shield globe, protecting Reinhardt while he bashes enemies with his Rocket Hammer.

While pushing forward in the frontlines, Winston can still use his shield globes to protect Reinhardt while he launches his Fire Strikes, recharges his shield and to allow Reinhardt to safely use his Rocket Hammer in close quarters.

Winston can follow up Reinhardt's ultimate Earthshatter by leaping at them and then throwing down a shield globe and attacking with his Tesla Cannon, but other than that there really isn't much synergistic use with Reinhardt's Earthshatter and Winston's Primal Rage.

1)  Soldier 76:  Winston's Barrier Projector work very well with Soldier 76 to block incoming fire power away from him.  Since Soldier 76 typically stays with his team and not wonder around like other attackers, he is usually right with Winston to take advantage of his barriers, allowing him to safely dish out Pulse Rifle damage.  Soldier 76 can also Sprint into your barriers for him to take cover quickly.

Barrier Projectors also provide nice protection while Soldier 76 is using his ultimate Tactical Visor.  Winston also can Leap to Soldier 76 from afar and then throw down a barrier, this especially comes in handy while he is using Tactical Visor or if he needs shielding badly and his Biotic Field is still on a cooldown.

Soldier 76's Biotic Fields are very helpful for Winston.  Winston takes full advantage of the healing capabilities of Biotic Fields and will keep him in the fight a lot longer.  Winston can even Leap to Soldier 76's Biotic Fields for some quick healing.

Winston's Primal Rage can also make using Tactical Visor safer for Soldier 76, since the enemies will be batted around and have trouble aiming at him during this time.

2)  Torbjorn:  Winston's Barrier Projector can allow Torbjorn to safely repair his turret or dish out Rivet Gun damage from inside the barrier, which can further take his need away from reaching health packs as much.  Barrier Projectors can allow Torbjorn to safely go up in the front lines to pick up Scrap.  Winston's barrier can also pair well with Torbjorn's ultimate Molten Core, as Torbjorn is still slightly vulnerable while using it.

Out of all the tanks, I think Winston benefits from Torbjorn's Armor Packs the 2nd most (after Reinhardt).  Winston often Leaps up close to his enemies which can be punishing to his hitpoints by taking a lot of damage up close.  Armor Packs increases his survivability and reduces his need for healing as much.

Winston's Primal Rage can be beneficial for Torbjorn by batting enemies away from him, or knocking enemies into a turret's line of sight.

3)  McCree:  Winston's Barrier Projector is McCree's best friend.  McCree can safely dish out damage from inside Winston's Barrier Projector.  If McCree is in trouble somewhere, Winston can Leap to his rescue and then put down a barrier to further protect him from additional damage.  Winston's Barrier is also a great combination for when McCree uses his ultimate Deadeye, as he is normally very vulnerable while lining up his Deadeye shots.

Winston's Primal Rage with McCree's Deadeye is a mediocre combo.  Winston's Primal Rage will knock back enemies causing a lot of confusion amongst the enemy, during which a Deadeye can be a tad safer to use, and especially if Winston can put down a Barrier before using Primal Rage.

4)  Hanzo:  Winston's Barrier Projector works very well with Hanzo.  Hanzo can safely dish out bow damage from inside Winston's Barrier Projector.  If Hanzo is in trouble somewhere, Winston can Leap to his rescue and then put down a barrier to further protect him from additional damage.

Hanzo's Sonic Arrow can allow Winston to start leaping towards an enemy right before they come around a corner, potentially taking the victim by surprise and allowing Winston to kill the victim with his Tesla Cannon.  Sonic Arrow can also help Winston's Primal Rage by giving him more information on where to chase and leap after his enemies more effectively.

Hanzo's ultimate Dragonstrike can combo with Winston's Primal Rage by allowing Winston to knock enemies into the spiral dragons.  Primal Rage can also knock enemies away from Hanzo, potentially keeping him alive more efficiently.

5)  Widowmaker:  Winston's Barrier Projector can be very beneficial for Widowmaker.  Just like with Reinhardt's Barrier Field (shield), she can safely dish out damage from inside Winston's Barrier Projector.  Although Widowmaker tends to snipe from random perches and ledges and a lot of the time she is not near Winston to take advantage of his barriers.  But Widowmaker can stick around Winston a bit more if she can to take advantage of your barriers occasionally.  If Widowmaker is in trouble somewhere, Winston can Leap to her rescue and then put down a barrier to further protect her from flankers.

Widowmaker's ultimate Infra-Sight can allow Winston to start leaping towards an enemy right before they come around a corner, potentially taking the victim by surprise and allowing Winston to kill the victim with his Tesla Cannon.  Infra-Sight can also help Winston's ultimate Primal Rage by giving him more information on where to chase and leap after his enemies more effectively.

Winston's Primal Rage can provide a lot of distractions, potentially allowing Widowmaker snipe away without getting targeted as much.

6)  Junkrat:  Winston's Barrier Projector works very well with Junkrat, as it can allow him to spam his grenades while up close to the enemy.  If Junkrat is in trouble, Winston can leap to Junkrat's side and put down a barrier to potentially help keep Junkrat alive.

Junkrat's ultimate Rip-Tire can pair okay with Winston's Primal Rage.  Normally enemies will run away from a Rip-Tire, but Primal Rage can knock enemies back towards the Rip-Tire for the explosion to make a successful contact.

Winston's Primal Rage in general can help keep deadly close enemies away from Junkrat, like Mei, Reaper and Reinhardt.

7)  Mei:  Winston's Barrier Projector allows Mei to safely dish out damage with Icicles and throw down Ice Walls all while being shielded.  Barrier Projectors are also useful in close range, as it can allow Mei to freeze enemies up close while being shielded from everything else.

Winston is prone to damage from long range, but Mei can shield him with Ice Walls if his barrier is on a cooldown.

When Winston uses Primal Rage, it's generally a good idea for Mei to wait and use Blizzard at a different time, since Primal Rage will most likely knock enemies away from the Blizzard.  What Mei can do while Winston is using Primal Rage is prevent enemies from running away from it by blocking them off with an Ice Wall.

1)  Bastion:  Winston's Barrier Projector work very well with Bastion to block incoming fire power away from him.  Winston should take note where a Bastion Sentry is positioned, so he can line up his barrier to block shots away from him.  Winston can also simply Leap to a Bastion Sentry and then throw down a barrier for a more solid protection for him.

Barrier Projectors also provide nice protection while Bastion is using his ultimate Tank Form.

Winston's Primal Rage can be very helpful if Bastion is getting ambushed.  Primal Rage can bat all the enemies away from him, allowing Bastion to freely fire at them with his gatling gun.

2)  Pharah:  Winston's Barrier Projector can be a safe place for Pharah to be at when she is unable to fly in the air.  Being under a Barrier Projector is a great time for her to use her ultimate Barrage as she will be shielded from most of the attacks in the game, only Reinhardt's Fire Strikes or Symmetra's Photon Orbs will be able to penetrate through the barrier.  The negative aspect of Barrier Projector is that it is ground based, so when Pharah is in the air it will have virtually no protection for her.

If Winston is being attacked by deadly close enemies like Mei's frost stream, McCree's Flashbang, Reaper's shotguns, Reinhardt's Rocket Hammer, or Zarya's Particle Beam, Pharah can protect him with a Concussive Blast against these foes to knock them away from Winston.

After Pharah lands from a Jet Pack flight, Winston can activate Primal Rage to protect her for awhile (by knocking enemies away from her) until she can Jet Pack again.

3)  Genji:  Winston has the capabilities to keep up with Genji thanks to his Leap ability.  Winston can Leap where Genji is at and then throw down a Barrier for protection, which can also help protect Genji while he is using Dragonblade.

4)  Reaper:  Winston's Barrier Projectors work as great crowd control for Reaper.  Winston can Leap toward Reaper while he is in the front lines flanking and then throw down a Barrier Projector.  By isolating only the flank target close to the barrier and blocking out all other firepower from the enemy can make the flank very successful.  This same tactic can also be used to protect Reaper when he is using his ultimate Deathblossom.

Winston can also provide even more crowd control with his ultimate Primal Rage by knocking enemies away from Reaper, allowing Reaper to only focus on killing one at a time instead of being bombarded by a bunch at once.  Because of this, it's generally better for Reaper to use Deathblossom at a different time that Winston uses Primal Rage, since Deathblossom is great for killing a lot of bunched up enemies in a small area.

5)  Tracer:  Winston has the capability to Leap towards Tracer while she is harassing or flanking and then throw down a Barrier Projector for protection.  Winston can help Tracer harass enemies with Primal Rage by knocking them around.  A Primal Rage Winston combined with a Tracer zooming around can really confuse the enemy quite a bit.