Here's what's in my playlist:
Dead Can Dance
Trio Mediaeval
Corvus Corax
Gunnar Madsen (Fall of Troy)
Vangelis (El Greco, Mask)
Glass Hammer
St. George's Canzona
Mussorgsky (Pictures at an Exhibition)
Stephan Michael Sechi
Jocelyn Pook
Assorted Enya, Clannad, Brian Eno, etc.
Soundtracks from: Myst, Riven, Myst III, Uru, Myst IV, Myst V, Beyond Good and Evil, Eternal Darkness, Assassin's Creed, Xenosaga, Skies of Arcadia, Conan, Spirited Away, The Black Hole, Crouching Tiger Hidden Dragon, Alexander, Dragonheart, Gladiator, The LOTR series, The Navigator, The Last Temptation of Christ, The Princess Bride, Russia: Land of the Tsars, Vertigo