The piece "Gandalf" in Meji's Lord of the Rings symphony is largely pitched in E minor, with parts in A♭ minor and A minor

"This key can carry grief, mournfulness, restlessness. Like a princess locked in a tower longing for her rescuer and future lover."

This key is seemingly exclusively used for band music, with it never being used for jazz. That being said, its usage in band is rather sparse, frequently being a "temporary" key for songs to rest in prior to modulation.