Isn't The Last Man on Earth with Vincent Price pretty spot on to I Am Legend? It's been a while since I've read or watched them, but I don't recall any glaring omissions or inconsistencies.
In the book the guy is a factory worker who teaches himself science. Last Man was the first of the movies to introduce the scientist aspect. It is by far the closest to the book though.
As has been stated:
The first Harry Potter film. This is basically a literal translation from the book with only minor things omitted. (Like Peeves the ghost.) Everything else was literally scene-for-scene.
I'd also agree with Silence of the Lambs being identical at least to my recollection.
Game of Thrones, however, is NOT identical, in that it has a bunch of stuff added in. Nothing's missing, but it definitely has additional scenes that appear nowhere in the first two books (I haven't read the third, so I don't know if we get flashbacks).
For example, Robert's conversation with Cersei where they're talking about their marriage and laughing ruefully? Never happened.
Same goes for the "shaving" scene between Renly and Loras Tyrell. Not in the book.
That's not to say that what's on screen isn't faithful to the book, just that what's on screen also has a fair bit of additional stuff. I suppose you also miss internal character thoughts, but the actors can portray that through reactions and such.
Are some of you folks not getting the point of this thread? The whole point is a movie that is EXACTLY like the book. Making comments like, "Except for the part where..." makes it a movie that doesn't belong in the thread. If it's really close it doesn't count. "The only thing they changed was..." is also not a contender.
We're looking for an exact match, people.
Well, it would be had Kubrick not read the American version that omits the final chapter where Alex finally outgrows his sociopathic urges through free will and not brainwashing and as the book is sort of about redemption through free will the film generally falls flat in that regard.