I know this is going to sound insane but i think Khan is a decent example. He recovered and went on a decent run. But then he was young and Pacman isn't
Manny Pacquiao Mike Tyson Amir Khan (Sure I dislike him but there's no denying he came back strong after the brutal KO against Peterson so early in his career. Despite running for the hills for a rematch, he still fought on strong, have to respect that.) Tony Thompson Thomas Hearns Erik Morales George Foreman Ken Norton Roberto Duran Far too many to mention all, I'll just leave it at that.
Been awhile since I've seen it, but wasn't the great Marco Antonio Barrera's first loss to Jr Jones a DQ caused by his corner getting all crazy while throwing in the towel, or something like that?
First loss of 2 to Jr. Before that he was just steamrollin' guys. Used to have a career set but it's been awhile...