Me personally, it would have to be:
Tank: Doomfist because he really needs a buff. Afterall he’s not called “DoomPrimaryFire” for no reason :/
Support: Moira because most (not all) of the players I see playing Moira just use her as a DPS and use up a valuable Support role
DPS: Sombra. Any explanation needed? (She hurts my brain)
Orisa sombra mercy.
I would be playing Overwatch 24/7 if these heros weren’t in the game.