Off of the top of my head, get your hands on the following releases:
Porcupine Tree - "In Absentia", "Stupid Dream", "Deadwing"
Anathama - "Judgement", "Eternity", "Alternative 4"
Antimatter - "Planetary Confinement"
Ancient Rites - "Fatherland"
Arcturus - "The Sham Mirrors"
Angel Corpse - "Exterminate"
Wolves In The Throne Room - "Diadem Of 12 Stars"
Iron Maiden - "Seventh Son Of A Seventh Son", "Powerslave", "Somewhere In Time", "Brave New World"
Brocas Helm - "Black Death", "Into Battle"
Areknames - "Love Hate Round Trip"
Aarni - "Baathos"
EyeHateGod - "Take As Needed For Pain", "Dopesick"
Jesu - "Silver", "Jesu"
Burning Witch - "Crippled Lucifer"
The Gault - "Even As All Before Us"
Cacophony - "Speed Metal Symphony"
Holy Terror - "Terror & Submission", "Mind Wars"
Sodom - "Agent Orange", "Tapping the Vein"
Coroner - "Punishment For Decadence", "No More Color"
Toxic Holocaust - "Evil Never Dies"
Blood Axis - (anything and everything you can find)
Current 93 - (anything and everything you can find)
Fire + Ice - "Birdking", "Midnight Fires"
Forseti - "Erde", "Windzeit"
In Gowan Ring - (anything and everything you can find)
L'Orchestre Noir - "Cantos", "Eleven"
Of The Wand And the Moon - (anything and everything you can find)
Sol Invictus - (anything and everything you can find)
Ahvak - "Ahvak"
Anekdoten - "From Within", "Vemvoid", "Gravity"
Anglagard - "Buried Alive", "Hybris"
Comus - "First Utterance"
German Oak - "German Oak"
Paatos - "Kallocain", "Timeloss"
Univers Zero - "1313", "UZED", "Heresie"
I think that's enough for now.