Heavyweight: Lennox Lewis (1995-2003), Mike Tyson (1986-1989) Cruiserweight: Evander Holyfield (1986-1988 ) Light Heavyweight: Roy Jones (1996-2003). He beat all except DM. Super Middleweight: Joe Calzaghe (1997-2007) Middleweight: Bernard Hopkins (1995-2005) Light Middleweight: Terry Norris (1990s) Welterweight: Oscar de la Hoya (1997-2000). If you count that he beat Trinidad. Light Welterweight: Kostya Tszyu (1998-2005) Lightweight: ??? Super Featherweight: Floyd Mayweather (1998-2002)
