@Mrfunkedude Are we just talking about movies, or do mini-series count as well?
IMO, Hollywood is more likely than not to shit all over the source material. There are, of course, exceptions. Here are a few that come immediately to mind:
Shawshank Redemption
Seabiscuit
The Crossing
Good Omens
I Love You, Beth Cooper
Sleepers
Lonesome Dove
A Christmas Carol (George C. Scott version)
The Road
Interview With The Vampire
Into the Wild
Mrfunkedude