Happy Birthday, Ross!
Here is an obscure one, IMO the best from Tzar: The Burden of the Crown:
The style is medieval, it's based on a national Bulgarian song about tzar Ivan Shisman and the fall of the Second Bulgarian Empire. The game is an RTS from 2000, created by a Bulgarian studio, I'm not sure if it's still for sale.
The song is on a playlist, so in case you like it you can check the others out.
Some of them are good, some of them are hit-and-miss.
Another recommendation I have is the soundtrack from Red Alert 2, which I am 90% sure you must have heard (you've probably even mentioned it somewhere), but I'll share it anyway, just because it's worth it:
[Hell March 2, personal favourite]
As for a movie soundtrack, I'll go with a mix from Lord of the Rings. I know it's a VERY popular movie, but the Saruman/Isengard theme can only be described with the words EPIC and BAD-ASS once the tempo picks up. I like to listen to it on repeat often.