Oppenheimer one of the few films that would win every single year (though it would be weird if it won pre-1945). Past dominant winners like Dances With Wolves, Lawrence of Arabia and Gone With The Wind too problematic for modern sensibilities. Lord of the Rings and Silence of the Lambs and any musical too genre for certain eras. One Flew Over The Cuckoo's Nest swept up but might not be "important" enough to win all the time. Even Titanic and Forrest Gump might get picked apart for being too goofy these days, though they did give it to Coda and EEAAO. Godfather I and II, Amadeus, Casablanca, Oppenheimer off top of my head that check every box in every era. May have forgotten something but point is Oppenheimer up there with most dominant contenders ever.