This is a TOUGH question, but a few come to mind...
- The Road Warriors (aka Legion of Doom). Everybody else ACTS tough, but these guys are the REAL deal
- The Bushwackers (some funny bastards!)
- George "The Animal" Steel (Scary fella!)
But, my ALL TIME FAVORITE is... Jimmy "Superfly" Snuka, there's just NOBODY else that could fly like him!