Give me a list of the best bodybuilders of all time.
There were many great bodybuilders, but most associate the best with those who have won Mr. Olympia, the most prestigious bodybuilding competition in the world. Those who have the most wins in chronological order are:

Arnold Schwarzenegger (7 total wins)
Lee Haney (8 total wins)
Dorian Yates (6 total wins)
Ronnie Coleman (8 total wins)
Jay Cutler (4 total wins)
Phil Health (7 total wins)