Tough to limit it to 5 because being a champion takes a lot of heart to begin with. Those already named with exception of Haye are deserving of being on this list. Lewis had a lot of heart, can list a number of arguments for with a few against but watch his fights with Ray Mercer and Vitali and clearly he had a ton. Honorable mention to Vitali, he earned the ‘Terminator’ nickname, the Chris Byrde debacle notwithstanding.
my pick is Holyfield. I just rewatched holyfield vs bowe and holyfield took some big shots from a really big dude and he kept going at him hard, lets go champ...
Just out of interest, will you be writing letsgochamp on every reply you ever make for future posterity in this forum?
Frazier showed just about all the heart you could in the thriller in Manila, he was going to die in there.