!!!
I was going to suggest these and thought people would just laugh about it.
Don Davis is utterly amazing, in regards to the unconventional score (especially the music in "The Matrix Revolutions" -- that was unfortunately probably the BEST part of that movie!)... and even the "commercial soundtrack" for Reloaded wasn't bad.
And of course, the theme is a classic example of creating a recognizable piece out of an atonal melody... neat (!).
Hans Zimmer and James Newton Howard have done some nice soundtracks as well. (Zimmer is very versatile.)
Another evocative composer is David Julyan, who has done all the soundtracks (or close to them) for director Christopher Nolan (Memento, The Prestige, etc.) as well as the background music (creepy stuff) for "The Descent."
I also liked "The Nightmare Before Christmas" soundtrack

-- and the early Ashman/Menken broadway style music (Little Shop of Horrors, and the rebirth of Disney).
"The Incredibles" soundtrack was good as well.