I knew this would happen, but I forgot two of my favorite pieces ever.
U2 - Pride (In The Name Of Love)
I don't particularly like most of the music this band puts out, but there are 4 songs that are absolute masterpieces. This is the one I am choosing for this list.
Trevor Jones/Dougie MacLean - Promentory/The Gael
If you haven't seen this movie, skip reading this, skip watching the clip, and just watch it NOW.
Spoilers:
This is master filmmaking paired with one of the most effective movie scores of all time imho. The way this piece builds to Uncas' last stand, the subtle strings swell on Alice's fall, and the drum roll Chingachgook's charge.... One of the most memorable movie endings put to film.