I don't listen to them all that often, but when I'm in a mood for orchestral music I love listening to the "modern" classics - Zimmer, Horner, Williams, and to some extent Elfman and Silvestri. oh, and as a ST:TNG fan, Jerry Goldsmith!
Trivial fun fact: When I bought the movie Apollo 13 on DVD, probably 14 years ago now, I was presently surprised to find an unadvertised feature: If you just leave it on the start menu screen it plays the entire soundtrack!