Those guys you mention were all naturally too big for FMJ except maybe Duran & Casamayor & I believe you have predicted that one wrong... Mayweather would **** any version of Casa up, seriously, but not Duran. Mayweather is certainly one of the most talented boxers ever & the best boxer of the past 10-15 yrs without doubt but Robinson, Ali & Pep were the best ever IMO.
7 people really voted for Floyd? I guess nuthuggers will always be around Even if he beats Cotto, Margarito , Paul Williams and Pacman I would still not have him as GOAT (But definitely much higher than I have him now haha, top 8 for sure)
I think he has a case for top 20. I'd probably stick him top 30. I think somewhere around where Bernard Hopkins is fitting.