Re: Wladimir Klitschko vs. Rocky Marciano
Marciano just isn't proven against super heavyweight fighters. Had he fought and destroyed Valdes we might have a better idea as he was big with a solid jab.
Dempsey, Frazier, and Louis these guys did beat super heavyweights so I can understand those who favour them over Wlad but the same can't be said for Rocky. It's like comparing fighters from different weight classes and it's too much of a leap of faith.
I don't agree that Wlad is greater yet but I think history will remember him as the greater heavyweight. he'll probably stay champ until he's 40 racking up victories over ranked contenders.