As usual you're making it harder than it is.
Chords are chords. There's no such thing as "chords in a non hip hop environment". Some of the hottest tracks follow chords sampled out of different genres including classical.
Sound selection and style of playing help dictate the overall sound a lot too. Short, staccato notes opposed to long, vibrato notes give drastically different sounds/feels, as well as use of different instruments in different octaves. A distorted guitar playing the same chords as a string section will have a different sound/feel. While, a string section playing Bat different octaves have drastically different sounds even playing the same chords.
For a scary, ominous sound, try starting with a big low end instrument. Maybe a crunchy or buzzy synth, string, piano, bass or horns. Layer them if you want. Then contrast that with something in the high end at the end of every bar or 2. A little tinkle of piano keys here and there, or a few high string stabs.
Then for an eerie background effect use a sine wave pitched high with a lfo on the volume that has a slow attack so it fades into a little "wobble". Make it sit nice in the background, real subtle-like.
Try this chord progression: Cm - Bdim - G - Cm 1st inversion (the G is the root note of the chord). It's not really scary, or ominous, but has kind of a sad, mournful, almost sinister sound with a hopeful resolve to it depending on instrumentation.
There's tons of ways to go about it. Stop thinking strictly hip hop and start thinking music.
Also, just because you're in the key of Dm, you're still using a few major chords depending on the progression. Don't think just because it's a minor key, it's totally made up of minor chords. One of your comments sounded like that's what you were thinking. Different sounds require the right mix of all different types of chords. Notice the progression I listed contains minor, major, diminished, and inverted chords.
Told you no hate on FP. Don't say I never gave you nothing.