Hey cool topic. But this discussion would be best with some sample clips no?

I wonder why no one's listed Richard Wagner's Ride of the Valkyrie yet. Listening to that song while bombing something from the air is soo cool..

My other personal favourites:

1. Basil Poledouris - Anvil of Crom

2. Beethoven - Symphony no. 5

3. Mozart - Dies Irae

4. Carl Orff - O Fortuna

5. Tchaikovsky - Overture ( V!! V!! V!! )

well, as you can see most of them were used extensively in movie soundtracks and trailers. can't help it, they just sound damn epic!!