Just to name one that hasnt been said, I think Cory Spinks back at his best..... especially against guys like an actual prime Mayorga and Jermain Taylor.
the recent version of Bernard Hopkins, which makes it even more impressive at his age that he's going 12 rounds every time.
I made a thread about this guy a while back. Its almost unreal how little power his record suggests. either that he has zero killer instinct.
Here is the issue with that back in his era you damn near had to kill your opponent to get a KO. As long as you could get up the referee would allow the fight to continue. These days flurries against the ropes or a bloody nose and the referee will stop it. Not saying LaMotta was a power puncher because he wasn't but if he fought in todays era his stoppages would be much much higher. :good
Ridiculous. Seriously ridiculous answer. As are several of these answers. I don't know what sport some of you guys think you watch.