Here's a few more bands I'm sure all you Opeth fans will appreciate:
Drawn (Norway) "A New World?" Featuring In The Woods... alumni. Experimental death doom with grand songs that travel in a thousand bizarre tangents but still manage to maintain a coherent sense throughout.
Vintersorg (Sweden) "Cosmic Genesis" Use old metal (Uriah Heep, Rainbow, etc)influences in the same manner Opeth use old rock (Camel etc) influences.
The Black League (Finland) "Ichor." Featuring rock and roll god amoung men Taneli Jarva of Sentenced/Impaled Nazarene fame. \m/
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Bleak Finnish death rock as only Taneli and company could deliver.
Ebony Lake (England) "On The Eve of The Grimly Inventive." Like "My Arms, Your Hearse" on acid. Weird stuff.
Forefather (England) "The Fighting Man." If you can imagine Opeth playing English folk songs you can imagine Forefather.
Green Carnation (Norway) "Journey to The End of The Night." Norwegian super group featuring members of Emperor, Carpathian Forest, In The Woods..., Tristania, (maybe more). Fantastic clean vocaled doom. A mix of In The Woods..., Autumn Tears and Oxiplegatz.
In The Woods... (Norway) "Three Times Seven On a Pilgrimage." Godly psychadelic doom act sadly disbanded.
Isengard (Norway) "Hostmorke." Fenris's black folk masterpiece. All will worship at the house of Isengard! \m/
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November (Italy) "Wish I Could Dream it Again." Classy Italian death doom with clean and dirty vocal lines. Good stuff.
October Tide (Sweden) "Rain Without End." Jonas and Fredrik from Katatonia's death doom side project which is pretty much "Brave Murder Day" worship and why not?
Orphaned Land (Israel) "The Beloved's Cry." Old-school Israeli death doom in the typical "Holy Records" vein. (i.e. Fantastic!)
Paragon of Beauty (Germany) "Seraphine...Far Gone Gleam." Imagine Opeth playing tribute to the German goth scene but managing not to incorporate all the cheese and pretension. Worth a listen.
Silent Streams of Godless Elegy (Czech Republic). "Iron." Absolutely fantastic Czech death doom. I must for every fan of the genre. \m/
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Storm (Norway) "Nordavind." Fenris delivers more fantastic black folk out of Norway with the help of a couple of his friends: Satyr (Satyricon) and Kari Rueslatten (Third And The Mortal).