The 5 Greatest bodybuilders of all Time, that’s a good question there’s a big difference between the greatest bodybuilder and the greatest PHYSIQUE of all time so going on that criteria
(1) Arnold Schwarzenegger....transc ends multiple generations in everything he accomplished etc etc.
(2) Steve Reeves...transcended 1940s, 1950s in terms of physique, popularity, movies, and is STILL regarded in a lot of circles today as having one of the most perfect physiques ever.
(3) Bill pearl...too the best of my knowledge (I could be wrong) NOBODY in history has won the Mr Universe in 3 separate/different decades...1950s...1960s. ..1971 that alone will probably never be matched and will continue too stand the test of time.
(4) Lee Haney...undefeated as Mr Olympia 1984-1991, got out young (31 or so) completely dominated his era, seems too have his health intact, runs a successful business and in regards too under privileged youth etc etc
(5) Ronnie Coleman/Dorian Yates/...Both set levels that were so dominant they transcended their respective eras still talked about today as the bench mark in extreme levels in muscle size, condition, etc.