Tim Burton is a good director. But only when he is doing his own films. All of Burton's worst films were adaptations of an established franchise.
Whoever thought that a Burton-esque Planet of the Apes would be a good idea has a couple screws loose.
Some of the films he does just don't fit with his style of filmmaking.
His best works, Nightmare (he was the producer, but it was his original idea), Corpse Bride, Beetlejuice, and Sleepy Hollow, are all mostly original works.
Yes, Sleepy Hollow was a legend, but Burton fleshed it out into a coherent narrative, rather than just a scary story.
And yes, Corpse Bride was based off of a Jewish folk tale, but the same rules apply.