What's your favorite RPG battle theme?

Any favorite examples are appreciated, but there's a specific purpose I've got in mind.

I'm working with a musician for my game project who doesn't have much experience with the type of combat-music sound we're going for. I'm leaning pretty hard into the Etrian Odyssey rock themes, but I'm trying to find him more good examples - instrumented, not chiptunes, and frustratingly enough without guitar as that's a hell of a lot more difficult for him to compose for.

Any suggestions are appreciated, even if they're obvious, well known ones! My days of playing every RPG on the market ended about twenty years ago.