Heavyweight: Harrison (86) Cruiserweight: Cunningham (82) Middleweight: Hearns (79) Welterweight: Williams (82) Lightweight: Mosley (74) Featherweight: Caballero (72) Bantamweight: Austin (71) Flyweight: Barrera (70)
Floyd Mayweather....5'7 with a 72 inch wingsapn and he isnt the broadest of men. Obviously Paul Williams. As for heavyweights Rahman and Liston spring to mind.