Lennox Lewis
David Tua
Ike Ibeabuchi
Mike Tyson
Julian Jackson
Roy Jones Jr.
George Foreman
Gerald McClellan
Nigel Benn
Diego Corrales
Naseem Hamed
Prime Barrera
Oscar Dela Hoya
Felix Trinidad
Shane Mosley at lightweight
Fernando Vargas
Ike Quartey at welterweight
Frank Bruno
Khaosai Galaxy(he had 6 ko's in the 90's, but was p4p a uber hard puncher)
Tommy Morrison