Rocky Marciano. He beat HW champ Jersey Joe Walcott, LHW champ Archie Moore, former HW and LHW champ Ezzard Charles (who was 33 years old at the time), and other highly-ranked HWs like Joe Louis (coming off an 8-fight winning streak), Rex Layne, Roland LaStarza and Harry "Kid" Matthews.
His name has only three letters. The opportunity to best his accomplishments will not likely occur again as the two eras he dominated will never be matched in our lifetimes. Joe Louis is the only other competition in this conversation.
The slaughter you gave me last week? You mean the one where you didn't reply back to me, because you'd got no comeback? That slaughter? Ha!
You're actually preaching to the converted here regarding Lewis,I'm a big fan I rate him extremely highly. However your lack of knowledge and cluelessness regarding Ali isn't hidden in your posts despite them making "War & Peace" appear to be like a short story. Despite all your long winded rantings you are clueless and really need to study the subject matter more closely,that's if you can come out from in the shadow of Lennox's nuts for long enough. At the end of the day you're just another bias nuthugger.