Classical Keyboard Music

I love old keyboards - pianos, organs, harmoniums, mallet and bell instruments (if they count) and so forth - and I love dark and grand classical music. I was wondering if there was composer who wrote this sort of music mainly for different keyboards. Or if there was some kind of an organ quartet or something that performed well known works. or a really good dark soundtrack or something.

its pretty broad, but you get where I coming from. is there anything along these lines that would interest me? preferably in minor.

Marsen Jules - Herbstlaub

/thread