I'm starting to think that every incarnation of Superman has been the best at at least one aspect of the Superman adaptation.
Superman 78 was the best characterization of Superman himself
Smallville was the best at dramatizing the family relationship between Ma and Pa Kent and Clark
Lois and Clark was the best at depicting the supporting characters like Lex, Perry, Jimmy and Lois and the best adaptation of the locations like the Daily Planet and Metropolis.
Man of Steel was the best at showing the real extent of his powers and fleshing out the Kryptonian backstory.
Fleischer was the best at capturing the classic spirit of adventure the concept of Superman should exude.
Timmverse was the best at adapting Superman's place in the greater DC universe and with the other heroes.