Which are the bands with very unique vocals?

Definately Hat of Gorgoroth. From the Pentagram album and parts of the Anti-Christ Album.

www.youtube.com/watch?v=aaIMIB8x81k

Lenzig Leal from Cephalic Carnage.

www.youtube.com/watch?v=agnVjr3o_KY

Nergal from Behemoth. You can tell his vocals from a mile away.

www.youtube.com/watch?v=u__16bxOXtk

Abbath from Immortal believe it or not has pretty distinct vocals. You can tell its him when you hear a song.

www.youtube.com/watch?v=gEDacR4r6_0

I would say that Mayhem's current singer, Attila Csihar, is extremely unique. Unlikem some of their previous vocalists, who, for all their talent, were a little generic, Attlia is truely unusual. He sounds like the death rattles of a dying man. Listen to this if you want proof:

http://www.youtube.com/watch?v=bAEdm9gFaws

Messiah Marcolin of Candlemass

King Diamond

I'd say, in my opinion, Macabre takes the gold. They play, what they call, Murder Metal.

http://www.youtube.com/watch?v=1M7-zXAiMM4

http://www.youtube.com/watch?v=f0NzVlej7xc&feature...

http://www.youtube.com/watch?v=T6FQ5bzROsU

There is also Disciples of Zoldon, the weirdest band I've ever heard.

http://www.youtube.com/watch?v=WqvgF1c-DKU

Everything he's ever done is available for free download at:

http://www.solvere.co.nz/doz/Discography%20of%20ZO...

Dani Filth of Cradle of Filth has pretty unique vocals.

http://www.youtube.com/watch?v=ms9RQN8MaQ4

http://www.youtube.com/watch?v=ujeQBGS70lA

Kamelot has pretty unique vocals for a power metal band.

http://www.youtube.com/watch?v=0Qdcl67H1Jw

http://www.youtube.com/watch?v=58azvyFmKrc

Cryhavoc:

http://www.youtube.com/watch?v=BXxuXz7pU-4

http://www.youtube.com/watch?v=is_W_3cxsXI

Due it being an all female band, Astarte is a cool Black Metal band.

http://www.youtube.com/watch?v=lPNKCpyAYlk

http://www.youtube.com/watch?v=PcA_DWk2S1o

Vision Divine is another example, I guess.

http://www.youtube.com/watch?v=kCRTPCsEEeU

http://www.youtube.com/watch?v=4zYpmVfPsIw

Novembers Doom has weird vocals style.

http://www.youtube.com/watch?v=Vqb3lbKqhFI

http://www.youtube.com/watch?v=e0oQ7ZOKTls

I personally can't stand the vocals, but Converge is definitely unique.

http://www.youtube.com/watch?v=utT0lLC6d5Q

http://www.youtube.com/watch?v=oNfm6Flx1AQ

Blood Stain Child:

http://www.youtube.com/watch?v=yQhRS-4NXiE

http://www.youtube.com/watch?v=etG2_G78Yhw

...And Oceans:

http://www.youtube.com/watch?v=Abg7uBdwGJM

http://www.youtube.com/watch?v=CTFOBnfQ02E

I agree with you on Vio-Lence, but I'm going to throw in Slayer - not many people can sing like tom, imo.

i think Emmure's vocalist has a different tone to his voice...when he does his high screams, it sounds very...wet, like he's gargling or something.

not necessarily good or bad, but first band that came to mind.

High on Fire has a really unique vocalist.

iron maiden, kreator