Hmmm...not sure if these are the type of albums you are looking for, but I definitely consider them dark and/or disturbing:
Skinny Puppy "Too Dark Park" Coil "Horse Rotorvator" Depeche Mode "Black Celebration" Bauhaus "Burning from the Inside" Recoil "Unsound Methods" The Cure "Faith" or "Pornography" Siouxsie and the Banshees "Peepshow"
Try Porcupine Tree. Here is an example of their lyrics:
This is a hate song just meant for you I thought that I'd write it down while I still could I hope when you hear this you'll want to sue
Oh it's a lonely life in my empty bed And it's a quiet lie that leaks from my head These are the last rites The line is dead
Yes, I'm hearing voices too And I'm more cut up than you
And another example:
A walk in the woods and I will try Something under the trees that made you cry It's so erotic when your make up runs
I got wiring loose inside my head I got books that I never, ever read I got secrets in my garden shed I got a scar where all my urges bled I got people underneath my bed I got a place where all my dreams are dead Swim with me into your blackest eyes
A few minutes with me inside my van Should be so beautiful if we can I'm feeling something taking over me
Based on your positive review of King of Limbs, here is some dark music that has inspired Radiohead:
Joy Division (beautiful but bleak post-punk rock) Portishead (spooky and sexy trip hop) Krysyztof Penderecki (extremely disturbing orchestral music) The Smiths (first album is full of witty melancholy) Autechre (chilly electronic music - listen to "Tri Repetae" for ties to Kid A)
I was never a Joy Division fan but Moby's cover of "New Dawn Fades" hit the spot. I heard of Portishead and Krysyztof Penderecki is excellent. Not a big Smiths fan but they have their moments. Autechre did it for me.
When it comes to "Dark" music especially metal You simply can't go wrong with anything by: Blut Aus Nord (one of the darkest and most abstract Bands I have ever heard!) any of their Cd's will do. Also 1349 is a terrific black metal band that has tons of creepy atmosphere to thier music. Early Mayhem was really creepy and has a really dark history in Norway (look them up on Wiki). I highly recommend You check out Dissection and Emperor too!! For some classic dark don't forget about King Diamond and Mercyful Fate (great stuff!) Good luck!
Mark Lanegan Mark Lanegan w. Isobel Campbell Soulsavers The Afghan Whigs The Gutter Twins (Mark Lanegan and Greg Dulli of Afghan Whigs) 16 Horsepower Woven Hand (from the ashes of 16 H.P.) Burzinski (obscure, French, cold wave) Lou Reed's album "Berlin"
I would add Tombs, Burzum and early Darkthrone to the metal category. Dead Can Dance are a melodic, and elegiac band well worth checking out. If you want some truly dark and even frightening music I suggest Scott Walkers' last two albums: Tilt and The Drift. Aphex Twin's Come To Daddy cd is pretty dark as well.