Has any Heavyweight fought a tougher slate of opponents than Ali?

You're being a bit disingenuous here. Holmes didn't knock Mercer out, he outpointed him. It's also widely known that at the time Holyfield faced Moorer he was experiencing serious heart issues and visually didn't like "The Real Deal". It’s as clear as day.

 

Lol the fact still remains that a man from the 70's era took a 10 year lay off and still knocked out the guy who beat Evander....

 

I’m pretty sure an ancient Liston would’ve put Leon Spinks on the floor.

 

Holmes didn't knock out Mercer but don't let me stand in the way of emotional outbursts ..

 

The same guy that was decked by feather fisted Jimmy Young ? See the point ? Can paint any picture ..

 

Probably not at heavyweight no

 

Joe Grim perhaps?

 

Really? You think Foreman nearly won ? I thought Holyfield won comfortably. Forman won maybe 2 or 3 rounds

 

yea I dont see it ether

 

Again, why bother with facts .. there were three judges and the scores were 116- 111, 115 - 112 and 117 - 110. That aside, you're proving my point which is the 1990's Foreman was better than the 1970's version. Calmer. smarter, more confident, better conditioned, better pacing..

 

George made the event .. he sold it, he showed heart by going the distance , he took serious punishment but didn't go down .. that said while he performed tough at most he won a couple of rounds ..

 

LOL. People put Marciano in the top 10 as well. Those lists are worthless.

 

Liston is perhaps the most overrated boxer of them all. He went life and death wit Frazier, robbed Norton and beat Foreman who was limited anyway.
Holyfield was always the smaller man against Bowe and Lewis by a large margin. That decides the argument for me.

 

I don't put Marciano in the top 10, maybe for what he accomplished legacy wise but head to head he's nowhere near the top