An all time favorite score of mine is Rodney Russell Bennet's Lady Caroline Lamb soundtrack. The movie was a bomb, but the music is stunning. It exists in its soundtrack form, and also in a work for viola and orchestra—Elegy for Lady Caroline Lamb. It is comparable to the score for Somewhere In Time, although Lady Caroline Lamb is a much richer and diverse score.
Some other favorite movie soundtracks: The Lion In Winter, Sabrina, Ever After, Brokeback Mountain (the orchestral tracks, if you can get the Academy Award demo there are some extra orchestral tracks not included on the soundtrack.)
Now that I am thinking of this, I will probably come up with many more. I'm warming up to pitch!