Welcome to the forum mortiis37,
On the dark ambient side of things you should definately check out-
Blood Box- Funeral in an Empty Room and The Iron Dream
Yen Pox - Blood Music
Mulm - The End of Greatness
Kammarheit - The Starwheel
you are off to a good start with Atrium Carceri, one of my favourite Dark Ambienteers
Phobos was so kind and modest not to mention his own music…but if you are into Dark Ambient, thats a definite path to check also!
Thank you Tomas, that was very kind of you to say that.