He wasn't flashy, didn't make a fool of himself in front of a microphone, but bar none Bob Backland held the WWF title for 7 years in a row at one time, that's imposible for these times.
Goldberg was 164-0 before he was tased by Scott Hall, incredible when wrestling is fake, what promoter would let a streak like that happen
And finally, Bruno Samartino, the brute from Pennsylvania, he made a national sports show in the 70's called Greatest Sports Legends, the only pro wrestler to do it.
There they are, pick from those 3, there the best of all time.