Enlighten me with thou classic piano knowledge.

[nik0tine]

You will likely love Alexander Scriabin. Check out this, this and this
Not all of his music is dark, though. Some of it is absolutely gorgeous (that last piece may well be my favorite work for solo piano).

I may make more specific suggestions later, but if you like piano music you are likely to fall in love with both Chopin and Rachmaninoff, too. Check out Chopins nocturnes as well as his 24 preludes. Rachmaninoffs 24 preludes are probably right up your alley, too.

Edit: Oh! I can't believe I forgot this...