Beherit's "Drawing Down The Moon" is vastly overrated, in my opinion. The only decent tracks are "Down There.." and "Salomon's Gate". What's so good about the rest of the album is beyond me.
Sort Vokter's "Folkloric Necro Metal" is pretty damn overrated too. Granted, there are some interesting ideas to be found here and there, but it's not THE masterpiece that everyone claims it is.
As for the "cult" recommendations (yes, some of these are pretty famous, but still mandatory releases):
Behexen - By The Blessing Of Satan
Darkthrone - Total Death (I've been listening to this a lot lately, and I can't for the life of me figure out why this isn't praised a lot by BM fans), as well as the band's three releases after "Soulside Journey" (which is good, but DM)
Drudkh - Autumn Aurora
Dødheimsgard - Monumental Possession
Fimbulwinter - Servants Of Sorcery
Forlorn - The Crystal Palace (viking/black)
Gehenna - Seen Through The Veil Of Darkness (The Second Spell)
Gorgoroth - Pentagram
Graveland - The Celtic Winter
Helheim - Jormundgand
Kampfar - Mellom Skogkledde Åser (black/folk)
Keep Of Kalessin - Reclaim
Koldbrann - Nekrotisk Inkvisition
Kvist - For Kunsten Maa Vi Evig Vike
Limbonic Art - Moon In The Scorpio
Ragnarok - Nattferd
Twin Obscenity - For Blood, Honour And Soil
Vesania - Firefrost Arcanum