This is the real problem of arguing legacy across eras and weight classes, same as p4p discussions, in close situations there is no clear answer. Hopkins career doesn't have too many weight classes but there is a significant jump from middle to light heavy and I think he was Ring champ in both. His 20 defenses or whatever it was at middle weight is an amazing accomplishment as well. Manny rise through the weight classes is stunning but completely different. I have a hard time distinguishing one fighter over the other in legacy for Hopkins and Manny, but both are far ahead of Floyd. I believe Mayweather to have the potential to be ahead of both but he has sat back too much in his prime, unless he turns out to have the longevity of Hopkins, I doubt he will do anything/enough in the future to surpass the two other legacies as they are today.