I was always fond of Jimmy Wilde's "The Ghost with the Hammer in it's Hand." There's also a great Muay Thai kickboxer named Dieselnoi "The Sky Piercing Knee Kicker."
There was a muay thai star that came up with John Wayne Parr named Sangtiennoi "The Deadly Kisser" because he would kiss his opponent on the cheek in the break when he thought he was going to knock them out in the next round