There’s no one support that’s the best- They’re all good for specific circumstances.
Bridgett is a healer/tank hybrid that acts as a close-range brawler that denies other close-range heros like Mei, Doomfist, Tracer, Sombra and Reaper.
Lucio is a utility support specializing in disruption- his ultimate if timed correctly can save a team from most burst-damage ultimates- DVA bomb, Doomfist ult, Junkrat tire, etc.
Zenyatta pairs well with dive compositions as he can discord orb the dive targets so that they take 30% more damage as long as they’re in line of sight. His ultimate can also be used to counter numerous DOT ults: Moira, 76, Reaper, Bastion, and both dragon ultimates.
Moira is a healer whose potential is maximized in indoor locations due to the way her spheres work. She has the highest healing in the game with a limit on how often she can do it, but if the team is clumped together she can spray them all at once. She makes for a great offensive healer that can pick off low targets while flanking with her fade and her ult can be used from the back of your team in order to both heal your team and push forward against the enemy.
Ana is another great utility healer who can assist from the back, countersnipe, and with her grenade even disable enemy healing completely for a few seconds, completely countering both healers and sustaining characters like Reaper or Roadhog. Please stop nanoboosting Winston...
And Mercy is a good pick if your team is spread out or about to make a major push- she’s great for dive comps, her revive is ideal for locations where your team is far away from spawn such as final point on offense or first point on defense. She always pairs well with burst damage heros like Pharah and Junkrat due to her damage boost.
[doublepost=1545679362][/doublepost]No, seriously Ana players. Stop nanoboosting me during primal rage or even at all. I don’t think you know what little you’re actually doing.