20. Graveland - In the Northern Carpathians

A cheesy yet entertaining intro full church bells and crying babies begins this epic. Solid, raw, and classic, very atmospheric. 1994. Poland.
19. Velvet Cacoon - Avalon Polo

Publicity stunts aside, Velvet Cacoon created some serious atmospheric drone on Genevieve, and this track takes the cake for me. 2004. USA.
18. Summoning - The Rotting Horse on the Deadly Ground

My favorite by Summoning, total Tolkien worship, but great melodies abound. 1999. Austria.
17. Gorgorth - Gorgoroth

The intro is what makes this song so great. Layer upon layer of harmonized guitar trem-picked goodness. 1996. Norway.
16. Dimmu Borgir - Stormblast

Before they got terrible, Dimmu Borgir released an atmospheric masterpiece with the outro of this particular song being the climax. 1996. Norway.
15. Cradle of Filth - A Gothic Romance (Red Roses for the Devil's Whore)

Before you decide this list has lost all credibility, put your bias against this band aside and listen to this. Vampyric atmosphere at its best. 1996. England.
14. Walknut - Grim Woods

Not very well known. Atmospheric, hypnotic. 2007. Russia.
13. Ulver - Capitel II: Soelen gaaer bag aase need

Everything about this song is pretty much perfect, especially the chorus section with the clean vocals. 1995. Norway.
12. Blut Aus Nord - From Hlidskjalf

Icy and otherworldly. 1995. France.
11. Satyricon - King of the Shadowthrone

I could have just as easily picked Dominions of Satyricon, but decided on this one instead. Classic 2nd wave from Norway. 1994.
10. Darkthrone - A Blaze in the Northern Sky

The aggression to this album is insane, and something appalling was brewing within these guys back in the day. 1992. Norway.
9. Forest Silence - I Feel the Claws of Darkness

The least well known on this list (shame). Thick synth-laden atmosphere with razor riffage. 2002. Hungary.
8. Drudkh - The Eternal Turn of the Wheel

Many would pick False Dawn instead, but I prefer this one. Hypnotic and repetitive with brilliant harmonized riffs, just how I like it. Too bad this band only has 2 solid albums before becoming mediocre. 2002. Ukraine.
7. Vlad Tepes - Under the Carpathian Yoke

The definition of kvlt. Absolutely insane in a great way. 1995. France.
6. Nokturnal Mortum - Kolyada

Essential listening, especially the 2nd half. Folky goodness. 1997. Ukraine.
5. Windir - Saknet

Valfar (R.I.P.) was a true composer. Saknet is his finest work. 1999. Norway.
4. Nokturnal Mortum (again) Tears of Paganism/Lunar Poetry

Pure atmospheric aggressive black metal at its absolute finest. The horrible sound quality just adds to the fun. 1996. Ukraine.
3. Paysage d'Hiver - Der Weg

Listen to believe. The only black metal album as a whole that can compete with Burzum's Hvis Lyset tar Oss. Summed up best from some dude at surrealdocuments.blogspot.com
"The music of Paysage D'Hiver is used as a monomanic, minimalist musical mantra. This mantra is supposed to help the listener to visualize Alpine winter landscapes, and to experience this landscape as sublime, an aesthetic emotion of simultaneous attraction and fear, an emotion which finds its origin in Romanticism. Listening to Paysage D'Hiver is a phantasmatic practice."
2000. Switzerland.
2. Xasthur - In the Hate of Battle

The first Xasthur song I ever heard, and still by a landslide my favorite. I rarely listen to this (once every 2-3 years) to savor it all the more when I do. Depressive black metal at its best.
2002. USA.
1. Burzum - Det Some En Gang Var

No surprise here. Det Som En Gang Var will probably will be the best black metal song ever recorded, past and future. 1994. Norway.
A few notes:
For someone just entering the black metal world, many of these songs, particularly the depressive and minimalist ones, will seem like no big thing. They take many many listens to appreciate fully.
Also, no Emperor, Immortal, Mayhem, or Enslaved made the list, which even surprised me.
You probably think I'm a big nerd now, but I think you are missing out on some of the best music ever recorded.