How about Anna-Varney Cantonadea, Edward Ka-Spel*, Dave Tibet, Tiny Tim or Diamanda Galas?
Jesus, when I saw the title of this thread I thought of Diamanda Galas, Edward Ka-Spel and David Tibet, in that order. Pretty weird to see all three in one post.
I do have a lot of respect for Diamanda Galas still, don't like the others much. I listened to them a whole lot when I was 18 or 19, but can't stand them at all nowadays. I guess Ed's lisp is pretty endearing, it's just such dreary music. Actually some of that Tear Garden malarkey was
OK... and that weird Stockhausen cut-up the Silverman did on one of the Pink Dots LPs.
Anyway, thinking about Diamanda Galas leads me to
I Put A Spell On You. Both the original, by Screaming Jay Hawkins, and Nina Simone's version demonstrate the capacity for those singers to get at least "slightly weird". Shit. All 3 versions are great, now I think about it. Got to listen to the original right now!
I think Blixa Bargeld from Neubauten probably fits in here too. Maybe all the Nick Cave fans know him for his may-as-well-be-Nick duet on
The Weeping Song, or maybe from the shrieking towards the end of
Stagger Lee, but he was pretty insane in the early Neubauten day. He got other bandmembers to stand on his chest while he sang to see what would happen, things like that.
Scott Walker's voice made me laugh at first but now it scares the shit out of me.
Heh, I take it you're thinking of his later stuff? Pretty hard to be afraid of things written by Burt Bacharach et al.
I do find the song on 'The Drift' where he's riffing on the length of horses' faces or whatever incredibly scary, actually.