Chopin's Op.28, No.4 (Prélude In E Minor) arranged for some heavy guitars, bass, drums, and choir. Due attention to phrasing and tempo.
Note: I'm dissatisfied with the way this track sounds compared with what I hear on my recording software, so I'm attempting to work out the cause and will update it fairly soon.
Second Note: This is my second version.  I'm still not sure what's making my DAW bounce the track this way but it's an improvement anyway.

Prélude In E Minor (Chopin, Metal) (new version)

Master of Unlocking