G. Callen - NCIS: Los Angeles
First of all, anyone who doesn't have a first name is a renegade. That's not debatable. Furthermore, Callen lived in 37 foster homes. You read that correctly: 37.
Good thing for Callen, Hetty found him at a young age and molded his renegade tendencies into a superb government agent.
Watch NCIS: Los Angeles Mondays at 10/9c.