Great question. I've also been searching for such styles.

There's an 80's tinged midi style called Coleplay that can get at some of that dark foreboding feel, especially with some minor chords.

Another is CC Hive, which has a surprisingly good sounding midi electric guitar riff which puts me in mind of the b-52's or the Cramps.

For Realstyles check out Modrok1.

Any other suggestions, folks?