From the list it's Robinson, however I personally think it's a coin toss between Archie Moore and SNV. :rasta
The man was murdered by a Russian who never had a pro fight. Sugar Ray Robinson as the best. There are probably a few more skilled but not with the legacy. Ali as the Greatest for his heart and all the unbelievable moments he had in the ring. Mike Tyson as the most known boxer. Everyone knows not to **** with Mike.
Kudos for putting Hagler in the list. He is the best p4p of all time. Outbrawled the best brawlers (Hearns, Mugabi), and outboxed the best boxers (Duran, Leonard). He was the most complete fighter who beat every man he faced.