"You're gonna try to out-archer me? Good luck with that."

Marvel's Green Arrow. Okay kidding aside, Clint Barton was intitially introduced as a supervillain, and was one of the first to reform and become a hero alongside the Scarlet Witch. Armed with a bow and high-tech trick arrows, he's been a frequent member of the Avengers since. Though you might not think that with how many times he's dramatically quit the team.

He took up the Ronin identity briefly after his death and resurrection, while the Hawkeye mantle was used by Kate Bishop of the Young Avengers.