The other song that comes to mind is The Window by the Black Dahlia Murder. That is without a doubt the most f***ed up content I've ever heard covered in a song. If you're not used to death metal, don't look up. Trust me.
But the thing is, The Window is just barely gory enough to be stupid.
Angel of Death isn't stupid. It's a cold recount of real Holocaust torture methods.
People, metalheads or otherwise, have often inquired about my most shocking lyrics, and they're surprised when it's not "Chopped Up and Fed to a Dog" by AnalSavage (I made that up). Because that's stupid. Slam is stupid. That's why I like it from time to time.
Nah man, Angel of Death. It's the coldest song ever.