Bonecrusher The Hitman Touch of Sleep Atomic Bull Lights Out Second to Nunn Just a few off the top of my head... (And how has there been no one called The Sandman???)
Sugar Nickolai Valuev. I understand a couple of welterweights used the name before the great one was anointed with it here on ESB, but I don't know too much about that.
Manos de Piedra -- gotta use the Spanish version The Bodysnatcher Motor City Cobra Bonecrusher/Bonehugger