Some already mentioned. This is a revolving list unfortunately. Just the first 10 that came to mind. No order.
Slayer - Reign In Blood
Judas Priest - Sin After Sin (swaps with Sad Wings often)
Faith No More - Angel Dust
Metal Church - The Dark
Metallica - Master of Puppets
King Diamond - Abigail (swaps with Conspiracy, Them, The Eye, Fatal Portrait often)
Type O Negative - October Rust
Queensryche - Rage For Order
Mercyful Fate - Don't Break The Oath
Venom - Black Metal
Because 10 is dumb:
Jag Panzer - Ample Destruction
Iron Maiden - Seventh Son
Omen - Battle Cry
Cirith Ungol - One Foot In Hell
Iced Earth - Burnt Offerings
Tiamat - Clouds
Vio-lence - Eternal Nightmare
Flotsam & Jetsam - Doomsday For The Deceiver
Overkill - Under The Influence
Ozzy Osbourne - Speak of the Devil
Cradle of Filth - Dusk and Her Embrace
Agent Steel - Unstoppable Force
Opeth - My Arms,Your Hearse
Death - Spiritual Healing
Kreator - Endless Pain
Fuck it that's enough...