Maybe Dark Fortress is a wrong choice thinking about it, but that doesn't stop Stab Wounds being a fucking amazing album.
If you like Pink Floyd, strange metal and synthesiser work, you should definitely check out Ewigkeit, especially the album 'Radio Ixtlan'. 'Land of Fog' is pretty damn good as well, and I've warmed considerably towards 'Conspiritus'. You could describe Ewigkeit's latter efforts quite reasonably as what Pink Floyd might sound like, if they were a modern metal band. A bit similiar to new Samael now I think about it. One of my favourite bands/projects. You might also try the Meads of Asphodel, and on a cheesy outside chance, Bal-Sagoth, who are pretty much musical pulp fantasy, lots of over-dramatic vocals and keyboard pomp, but rooted in black metal rather than power metal, especially on their first album (A Black Moon Broods Over Lemuria).
Also, speaking of black metal and synths, you in to any industrial/cyber black metal? Aborym, Red Harvest, The Count Nosferatu Kommando and Trollheims Grott are all pretty sweet.