Guillaume David - Immortal Machine (on the Tube)
Guillaume David - Noosphere (on the Tube)

Cris Velasco - Fathomless (on the Tube)
Cris Velasco - Metamorphosis IV (on the Tube)

Aethek - Encapsulated (on the Tube)
Lustmord - Morphic Echo (on the Tube)

I'll add this one. Had to dig thru my old albums to remember the name. Felt dark in the 70's and I assume it still does??

Mahogany Rush - Maxoom - https://www.youtube.com/watch?v=UcXBvtQfKk0

This may qualify as well, from another Mahogany Rush album - https://www.youtube.com/watch?v=joPozFnJhZo

I'll go for melancholic mostly

Delta Rae - Bottom of the River
Hurray for the Riff Raff - The Body Electric
Sheryl Crow - (Standing) On The Outside
Nick Cave & Kylie Minotue - They Call Me The White Rose
Sheryl Crow - Make It Go Away (Radiation Song)
Nick Cave & The Bad Seeds - Red Right Hand
Sheryl Crow - It's Hard To Make A Stand
Hurray For The Riff Raff - Pa'lante

If you want something moving and a bit scary, listen to the complete Tubular Bells Part 1 and 2 by Mike Oldfield. That's quite a trip.