Again like I said though none of those guys are greater than Rocky, but just because they weren't as great doesn't mean they couldn't beat them, they were in totally different eras and Rocky wouldn't of been a heavyweight if he was in their eras. If we got a time machine and brought them back and Rocky lost it's really no big deal at all. Those guys are bigger, taller, stronger, more reach and Tony Tucker and Tim Witherspoon had good skills so it's not hard to believe they can beat a 5'10 185 pound man with a shorter reach than welterweights. 185 pound men ain't built to take power punches off guys like Rahman and Wilder too.
Liston?...the guy...who as Champion QUIT WHILE SITTING ON HIS STOOL against the light hitting Cassius Clay in Miami in Feb.1964? Then...a year later...TOOK A DIVE against Ali up in Lewiston Maine in May 1965...that Liston? Don't think so. Sonny had a bit of the "dog" in him.....no QUIT in Rocky Marciano!!!
No quit in Arturo Gatti either ,would you back him to beat Mike Spinks? Because that in effect is what you are asking of Rocky.
The guy who after getting a broken nose against monster hitting Cleveland Williams gravelled him? The guy who received a broken jaw early in a fight and continued to lose a split dec? Yes that guy!
Ali was light hitting? He stopped Bonavena, who else did? Mac Foster Ron Lyle Jerry Quarry x2 Jimmy Ellis Floyd Patterson x2 George Foreman Al Blue Lewis Karl Mildenberger Chuck Wepner Joe Frazier Zora Folley That light hitting guy!
Isn't that what I did? My opinion is that Marciano beats Johnson, and that the outcome of the Jeffries bout is far more clearly in Marciano's favor than the OP stated.
Ah! I see. It's funny because I actually had a second half of my post asking, "Or are you commending me for giving you what you asked for?" But I deleted it because I thought it sounded kind of arrogant if you weren't.