Present

Floyd Mayweather Jr
Juan Manuel Marquez
Ronald Wright
Bernard Hopkins
Joel Casamayor
Christian Mijares
Chad Dawson
Joe Calzaghe
Joan Guzman
Steve Molitor
Ivan Calderon

Past

Evander Holyfield
Pernell Whitaker
Mike Tyson
Ricardo Lopez
Salvador Sanchez
Wilfred Benitez
Roy Jones Jr
James Toney
Marlon Starling
Willie Pep
Miguel Canto
Jimmy Young
Jack Johnson
Roberto Duran

Are the ones that come to mind but i've probably forgot loads, but theres a few to get us started.