Posted before but these are my picks for the greatest fighters in the eight 'traditional' weight classes.
Heavyweight - Muhammad Ali
Light heavyweight - Ezzard Charles.
Middleweight - Harry Greb.
Welterweight - Sugar Ray Robinson.
Lightweight - Roberto Duran.
Featherweight - Willie pep.
Bantamweight - Eder Jofre.
Flyweight - Jimmy Wilde.
'Bonus' weights -
Cruiserweight - Evander Holyfield.
Super Middleweight - Roy Jones.
Light Middleweight - Thomas Hearns.