Watson in the Eubank rematch and Toney in the Barkley fight are close to unbeatable in those shapes those nights. In terms of greatness, Eubank and Benn are #1 and #2 for the true adversity they overcame against Watson and McClellan.
Some proper random lists here! But I'd like to "weigh in" (pun intended) with the most crazy list of all! Greb Fitzsimmons Langford Jones Jr Charles Choynski Conn Moore Hopkins Monzon Yeah, I know I'm a clown. But if you can weigh in anywhere up to 168lb, this is just how I see it.
You must know what you saw then. Total one-sided beatdown before a 1 in a million punch (truly great). Unreal.