Who did the movies get wrong? I can take a guess, like Aragorn is the standout I think, I know Aragorn felt very different than the books, I'd go out on a limb say Faramir too. Also maybe Glorfindel will get his appropriate spot.
I do feel for the most part a lot of the character were quite faithful to the books, there are nit pick slight changes like Frodo and Sam and maybe the ents, but none that do massive harm to the books.