I don't entirely agree My #1 would be your #15 (J C Chavez) then robbinson and all the other poops like Ali. Besides what other fighter do you know Besides Julio who went 90 & and 0 before being handed his first lost. 3 time World champ and lots more. Then there is Rocky who is the only heavyweight to have retired undefeated.Not to mention Ricardo Lopez who also retired a champ & undefeated

that being said I rest my case