Winston

Overwatch’s Winston is a super-charged, super-intelligent and technologically advanced ape who makes use of high innate mobility and protective shields to provide an extremely flexible tanking service for his team. Thanks to a leaping ability which allows him to get into the thick of the action nice and quickly, Winston excels at initiating fights and helping his teammates make a rapid push towards whatever the objective at hand happens to be.
Tracer

Tracer is an Offense character who relies on speed to get in close to her enemies, kill them, then get away. Her main asset is her Blink skill, which lets her teleport around the map very quickly. In conjunction with Recall, she is able to Blink right next to someone, kill them, then Recall back to safety.