I'll repeat things everyone said.
GO and ANENZEPHALIA, especially when vocals are slightly more human. (think about white power forces, amazade y negri, ecc)
CON-DOM, total obsession for the ultra layered and dishumanised voice
I had an obsession for E.J. Vodka of Final Solution.
Keith's vocals in TAINT were also super impressive.
Big Fan of Mikko (no ass liking), especially in the N12 series.