#3 Brutus "The Barber" Beefcake
The Gimmick in a nutshell: A wrestling barber who was actually pretty terrible at giving haircuts.
Brutus Beefcake has had some silly gimmicks over the years. He got his start by playing Hulk Hogan's relative "Dizzy" Hogan, which started their lifelong friendship (the two were at odds for a few years but seem to have reconciled). He has also been known as Zodiac, the Booty Man, and the Disciple.
But his best-known gimmick is undoubtedly Brutus 'The Barber' Beefcake. Beefcake would use his patented sleeper hold to render his opponent -- usually, enhancement talent -- unconscious, and then proceed to give them an absolutely terrible haircut. Then he would rouse them from their slumber and show them their new 'look' in a mirror, usually to their utter horror.
Why the gimmick managed to work: Brutus Beefcake was a massively muscled man, second only to Rick Rude and Hogan himself in terms of physique during WWE's classic era, so he was believable as a man who could put others to sleep. Also, he seemed to have a lot of fun playing the Barber, and his good mood was infectious, leading to him becoming quite popular.
Brutus is a WWE Hall of Famer in his own right who was inducted as part of the class of 2019.