Here are some more musical recommendations for a "soundtrack" to this storyline, if you're inclined to think in a musical manner like I am.
This does not represent the scope of the classical music I enjoy, but rather just some of the darker, more brooding pieces that are appropriate for a hell-bound story like this one. Below some of the pieces, in italics, are specific movements that I feel are particularly apropos.
Johannes Brahms - "A German Requiem"
- Denn alles Fleisch es ist wie Gras
Wolfgang Amadeus Mozart - "Requiem"
Carl Orff - "Carmina Burana"
- O Fortuna
Sergei Prokofiev - "Alexander Nevsky Suite"
Gustav Holst - "The Planets Suite"
- Mars, the Bringer of War
That's all from me for now.