Most of the stuff mentioned has dark ambient in it. Aren't you after straight dark ambient? If so then get both the Æthenor albums, Biosphere, Dark ages, Diagnose: Lebensgefahr- Transformalin, Jacaszek- Treny, maybe give Darkspace a go which is ambient bm in the veins of what you were listening to in the np, Twilight, Brian Eno, Boris and Arcana. That's all I can think about atm. Definitely get Diagnose: Lebensgefahr- Transformalin and Æthenor's two albums.