You seem to be insinuating Greb and Marciano were bums then- ? Marciano didn't train hard ? You don't know boxing too well friend if that is your opinion of the Rock and Greb. NOBODY was in better condition than the Rock- he took guys to the later rounds as was as good in the 13th as he was in the 1st, darn animal he was.
Ali said after doing the sparring for the computer fight that Marciano was better than Frazier and may have beaten him (Ali)
Styles make fights, gotta keep that in mind. Marciano was a rough fight for Ali-( according to Ali) , but how would he have fared against Foreman- ? it doesn't look good for the Rock here based on styles
Holmes is another underrated fighter, every bit as good as Ali in my opinion, he beats all the guys Ali beat except for possibly Foreman, Ali had a chin and heart like no other fighter, gotta give him that