1: Strangers/All of Us Strangers - my all-time favourite film, which is one of the few I can say, without experiencing that niggling book-blasphemy feeling, is better than the book.
2: Stardust - I loved the book so much, but the film has a totally different vibe, which I preferred.
3: Good Omens - technically not a film in this case, but an incredible series that is far superior to the book, I think.
(Couldn't screenshot, so had to improvise).