Prime Floyd v Rocky's Challengers?

This is possible, but we can never really know for sure.

Walcott II remains an enigma.

 

Based on the parameters of your post?...exactly what seamus said! The only caveat being Ezz but we're talking prime HW here. Prime Floyd? When was that? Perhaps after Liston? Show me another HW that could actually have been better after the two brutal beat downs. He blew two Quarry fights and the Ellis fight (maybe) with his passivity. Give him a 3-0 against them and then look at his record! 58-6 with two losses to Ali and Liston, both ATG's. Throw in a teenager loss to the seasoned Maxim (who many thought he won) and you're looking at a 59-5 with double match KO's over Ingo.
Can my hero be more underrated??