This remix will never grow old on me. One of the most beautiful things I've ever heard:

https://www.youtube.com/watch?v=PecO6O8qsSU

This is a difficult list to curate. My tastes are all over the place. I'm also limiting this to "bands", implying more than one individual contributing to the music. If there is a in the future, I'll be sure to include singular composers as well.