Atmospheric music?

Try Rain Fell Within. It's atmospheric metal with female vocals.
 
Great movie Soundtracks:
Bram Stoker's Dracula
Legends of the Fall
All Star Wars movies
Interview with the Vampire

Great atmospheric music:
Black Aria - Danzig
Black Tape For a Blue Girl - all releases
Xytras - Passage


But, the most atmospheric incredible band, EVER is:
DEAD CAN DANCE

d/l the following tunes:
"Hosts of the Seraphim"
"Windfall"
"Yulunga"
 
Dargaard is very cool, as already mentioned. You can d/l songs at their site, www.dargaard.com I believe.

Might as well look into Arcana then:
http://arcana.coldmeat.se/

I really like the song "Innocent Child."

Also, maybe new Mortiis.

Some other not-as-atmospheric, but good softer subtle music:
Ketil Bjornstad's/David Darling's "Epigraphs"
Herbie Mann's "At the Village Gate"

Highly recommended.