Out of everyone I have seen listed here I think its between Rogga and Paul Kuhr. Both can be brutal and articulate. Both are gods of death metal vocals. And both could very much complement the Bloodbath style.
The guy from early Psycroptic has a kick ass voice, I love it, but I dont feel that he would fit the Bloodbath spot. That weird scratchy stuff he does is very much part of his style, and not Bloodbath style.
I dont see anything special about M.S.'s growl(from Necrophagist), though I love the band and his music, his growl isnt really an esential part of it, and can prove to be monotonous.
Matti's style doesnt really fit Bloodbath IMO. He fit Dismember greatly, but I really dont see him 'fiting' many other acts to be honest.
Dave Vincent was godly. Dave Vincent is not the next Bloodbath vocalist.
Jinn, no. No no no.
Steele, you better had been joking about Dani. We want growls with balls, not growls produced from getting your balls stomped on.
But yeah, IMO the best of the people in the scene that I can think of for this particular position would either be Rogga Johansson or Paul Kuhr. I would love to hear either of them on a Bloodbath track.