Ahh, starting to finally come out of the closet. Good for you buddy, no need to keep your feelings for the young undefeated MW Champion locked up forever.
Pavlik and Calzaghe come to mind, Mayweather is too measured to even know if he has great stamina. And how about Gamboa, he went 10 rounds for the first time and looked like he could have done it again right after.
I can't believe no one has mentioned Povetkin. For a HW he is insane and probably has the best stamina out there
Valuev definitely deserves a mention ... the guy weighs over 300lb ... and has a pretty high work rate for a heavy .. and i have yet to see him tire.
Shane Mosley came in strong late to win both DLH fights,won rounds 8-10 vs Vargas in the 1st,KOed Rivera in the last round,came on strong vs Cotto the last 5 rounds,dropped Collazo in the 11th and hurt him in the 12th.
I think you may have missed Ouma last fight against K9. He looked like he was ready to fall over a few times through out, even K9 was in better condition.
I don't know if he has the best stamina, but you are right though. I thought he was going to lose his last fight with Chambers after the first couple of rounds. But he kept coming, throwing a ton of punches all the way to the final bell. Pavlik hasn't looked winded in any of his fights and he keeps an intense workrate. Wasn't even breathing hard between rounds after Jermain put him down in the second.
In the past I would have said Hatton but his diet had taken care of that. I remember Paul Ingle used to have incredible stamina.