bradley; has it pretty close as to size! first off Frazier was about 5'10" 1/2 at the most!! Ali was 6'3" and his best was 210-215 above that as he got older they needed to load up alot more with fluids because they couldn't maintain their conditioning fighting once a year compared to be active as they were as they came up!!
Te idea that Marciano had muscles he never knew he had is ridiculous (no offense) but that guy was ripped!!! Look at stills or videos and you'll see muscle and striations and this guy was NOT SMALL!
I stood next to guys like Marciano & Dempsey these men had thickness and structure that guys who are 6'4" 235lbs today simply don't have!!
He punched much harder at 190 than Wlad does at 240lbs because leverage and balance is applied but he was BORN with that natural power which always translates to punching power more than lifting weights !!!!!! The other thing that is never considered by the younger fans is Marcianos desire to win. He was a mean guy in the ring and to think that David Haye could defeat him is a joke!
To much attention is placed on size and not enough is placed on each fighters individuals skills!
Marciano was a highly skilled pressure fighter who started figuring distances and tendencies immediately!! david Haye would be pissing in his trunks at the end of the second round against Marciano, at ANY weight! Gtting hit by Rocky isn't like getting hit by an average "cruiserweight" getting hit by Marciano HURT! Go listen to Ali's interview about the filming of the computer bout. He wasn't being respectfull or smug he was dead honest!

If you take away a fighters record and height & weight the average boxing fan has nothing to comment on! Try learning to evaluate a fighters jab! Then go to the right hand and on to combinations then balance then defensive options and on & on.........................not who they fought and did that guy do well against the other guy...thats BS! These oversized guys today would get chopped down against yester years pressure guys. What do they do when Marciano slips under and comes up PUNCHING!! Do you think that Wlad KO's Rock in one? hahahaha the guy fought on with his nose hanging off his face!!!!!
Every era of fan thinks their era is better than any other as if their age group is superior to others hahahaha its as if they think their presence enhances the era!!!!! hahaha!!!
Marciano is a Champion and a top contender in any era!!! I don't believe he goes undefeated but thats another thread as to the importance and accompliment of being undefeated!! Ray.