The interesting part of Rocky Marciano's legacy is simply this.....what if he indeed had one loss? Then his record would be 49-1. Imo, that one loss would have dropped him way down the all time ranks. Contrastly, when Ali, Foreman, Holmes, Frazier, Tyson, and Louis lost a fight at the end of their careers, it didn't damage their legacies very much.

Camarel, I like your top ten list. I especially like that you gave both Holmes and Foreman their proper credit as I believe they both are underrated when discussing the all time greats.

However, I'd have Lennox Lewis higher on the list as he was the top heavyweight of his generation. Tyson would be left off as his greatest win was against a small Michael Spinks. Both Klitchko brothers make my list. I think that large, tall, athletic heavyweights have a big advantage over shorter opponents 40-60 pounds lighter.