We just had a cassidy (Benji) who’d insta snap to any enemy, even if above him or where he can’t really spot him right away. Cassidy probably 1st choice for aimbotters?
Cassidy is indeed a super common choice.
For dps its:
Cass, Genji, Hanzo, Widow, 76, Torb, Reaper, Soj.
For tank:
Hog(no1), Orisa, Zarya, DVa, Doom, Mauga.
For support:
Ana, Kiriko, Bap, Illari, sometimes zen.