Of course, I have to throw the Star Wars saga out there. Mononoke Hime Red Violin Where the Wild Things Are Avatar. This one, in particular, is so overlooked, when it really has one of the most atmospheric, emotional, and powerful soundtracks I've ever heard; gives me chills every time I hear it. The war music, in particular, is outstanding.
Hans Zimmerfor sure also such soundtracks as SuckerPunch, Pirates of the Carabean, Eagle, Prince of Persia, The last Samari, Lord of the Rings, Chronicals of Narnia and I think I may check out Legend of the Gaurdians - The Owls of Ga'hool.
Inception The Dark Knight Wall-e Nausicaa Spirited Away The Disappearance of Haruhi Suzumiya (seriously where did that composer come from? Disappearance soundtrack is best soundtrack) Anything John Williams put out, ever (particularly the original Star Wars trilogy) Scott Pilgrim (+1 for Metric's "Black Sheep") Tron: Legacy and I'm done.
The main theme from Chocolat Mission Impossible Summer from Kikujiro's Summer The main theme from Princess Mononoke (I want the piano score for it...) The time travel theme from Secret Go the Distance from Hercules He lives in you and Love will find a way from the Lion King 2