I'm not sure if visual novels count but the music for Umineko no Naku Koro ni has a wide variety of different genres for it's soundtrack:
For better rips: http://rokkenjima.tumblr.com/ You only need to download the music box albums to avoid Japanese vocals.
However they're a few spin off albums that are non vocal that I do recommend, Tytania and Amurita come to mind both are by the doujin circle D'va 5 / -45:
If that doesn't count some individual tracks from the Disgaea series stands out:
https://www.youtube.com/watch?v=1sLlo-Tco_8
