Who is the best DPS

WHo do you guys think the best overwatch DPS is

Bastion hands down
I mean, it isn't even a discussion

But if you are asking the best dps as a character overall, I'd say it is mcgree

Reaper, soldier 76, or junk rat. All very different but they can be high damage and have great mobility.

Bastion isn't that good itself. It is good when your team is with you (mercy boost, rein shield etc.), and it can be very powerful on payloads!
Doom is also a very powerful DPS, but take time to be mastered