As for LoTR, I briefly felt like killing myself in the final film, it was so bum-numbingly dull with that complete lack of any variation in emotional intensity that characterizes Peter Jackson's direction. It's like someone shouting in your face for three hours. But then a lot of contemporary Hollywood cinema is like that...
I've got all three films on the hard drive, but haven't summoned up the courage to watch them yet.
Your observation makes me less likely to, and is one of the reasons I rarely have any desire to watch anything Hollywood made after about 1990.
Re: the OP, I think Dr Zhivago would be my prime candidate. Far From the Madding Crowd is one that mirrors To Kill A Mockingbird, in their faithfulness to the book IMHO, and I'm a big fan of both books.
If you've never watched Marathon Man with Dustin Hofmann, and Laurence Olivier,
DON'T. Read the book first!!!!