I haven't beat Skyward sword yet. But yeah, anime music sucks hardcore. If no one does psas for Ghirahim I will when i get good enough, but that wont be for a few months. Im noob level.
Personally some animes actually do have good music, they just don't fit for machinimas.
Namely music from the big three (DBZ, One Piece and Naruto) are okay.
I just don't know where else to look for music tracks, other than zelda music there's not much else to choose from. and sometimes zelda music just doesn't fit the situation.