This might tread some of the same ground as some others (though I'll try not to do so), but here goes...
You
might like Sixteen Horsepower. They've got a creepy backwoods country vibe going on, I'd especially recommend
Low Estate and everything after. They're a religious group, by the way, but don't let that stop you, they were the bees (exceedingly creepy) knees.
In a similar vein, I'd recommend Jay Munly's solo work (especially
Jimmy Carter Syndrome, a record that I can't recommend enough) and the group he's involved with, Slim Cessna's Auto Club (in particular,
Always Say Please and Thank You is a fantastic record). The Auto Club is out on Jello Biafra's Alternative Tentacles label.
In a less organic vein, I've become quite a fan of Jessica's Crime.
Gone to Texas is a rather good record. I can hear shades of a lot of different things in their sound--punk rock, Morricone cowboy movie music, old country, industrial, etc (all sorts of things--the song 'Texas Skies' sort of reminds me of The Fall a little bit; incidentally, you might like them too). I've mentioned them on here before, and I took the plunge and bought the record. It's quite good. They have some tunes here:
http://www.myspace/jessicascrime
A few people have recommended Mark Lanegan; he's definitely got one of the coolest voices in rock. He began with a sort of whiskey-edged baritone, but is now approaching Tom Waits territory (ok, that's a bit of an exaggeration, but he's definitely got one of those voices that sounds better when it's been abused). The inaccurately named
Bubblegum is a killer record, as is the
Here Comes That Weird Chill Again: Methamphetamine Blues ep that preceded it. His earlier stuff is more sparse than either of these records, rather folksy in fact. He also did time in a band called Screaming Trees, sort of a psychadelic/punk prone to occasional moments of genius. I think that he is probably the only major talent to emerge out of the 1990's Seattle grunge explosion. Oh, and with that in mind, Mudhoney are just a really great dirty punk band, if you go for that sort of thing. Also, Queens of the Stone Age--to which Lanegan is a sometimes contributor--are also a bloody good band.
Nick Cave's Grinderman project is interesting. I know some people on here like it more than I do. Some of it's brillilant, some of it's not--which is basically my assessment of everything he's done since what i think is his last truly great record,
The Boatman's Call.
And while it's more than likely
not what you're looking for, I've recently been getting into Chrome a little bit.
HalfMachineLipMoves is the grandaddy to anything calling itself industrial-rock. Noisy, low-fi, and probably fueled by more copious drugs use than anything this side of Keith Richards, it's pretty neat. Really, it's hard to put this record into words.
Again, in a similar vein, if you've never heard Einsturzende Neubauten, I'd suggest checking them out. The early stuff is much more noisy than the later stuff. I tend to prefer the later stuff, and would recommend
Ende Neu and
Silence is Sexy.
If you've never heard anything by Leonard Cohen--a huge influence on the Sisters, natch--I'd recommend checking him out. Among my favorites is
Cohen Live, which has a gorgeous rendition of 'Dance Me to the End of Love,' as well as others. I may be in the minority in this, but I also think
Ten New Songs ranks with the best of his earlier work.
Oh, and I'll second the recommendation on Fields of the Nephilim's second LP,
The Nephilim. I don't think they ever made a record as close to perfect as this one; the only time Carl comes close ever again is with
Zoon. The new one I think is ruined by the production. It just sounds too digital for my tastes.
Hopefully something I've suggested will tickle your fancy. Enjoy.