Windstar
[12] Conqueror
The damage of Torb's turret is pretty low, but the rate of fire is pretty high, and of course, 100% accuracy.
This basically means that Torb's turrets are nasty against low rate-of-fire players like Genji, and McCree, but are less effective against durable and higher rate of fire targets like Dva (who is used a lot more often these days to deal with Torb, even though she's not a good counter to him) and Winston. Ironically, Genji and McCree excel at dealing with Bastion (most everyone does).
This basically means that Torb's turrets are nasty against low rate-of-fire players like Genji, and McCree, but are less effective against durable and higher rate of fire targets like Dva (who is used a lot more often these days to deal with Torb, even though she's not a good counter to him) and Winston. Ironically, Genji and McCree excel at dealing with Bastion (most everyone does).