Ringo Starr. He still rocks on a classic 4-piece set-up. Though he's played on a 5-piece kit on some occasions.
The late great Buddy Rich played on a classic 5-piece double-floor setup, and his setup didn't change so much during his prime.
Louie Bellson is another legend who's barely changed his double bass set-up.
How about Elvin Jones? Max Weinberg? Kenny Aronoff?