DESCRIPTION:
Voice Type: Baritone.
Vocal range: C1 - C#7 (6 Octaves and 1 Semitone).

Lowest Fry Note: C1 (Gehenna)
Lowest Chest Note: C2 (Gently)
Highest Chest Note: D5 (Hell & Consequences)
Highest Mixed Note: F#5 (Surgery)
Highest Whistle Note: C#7 (Tar Poo)

Corey taylor is an American musician, author, and actor, best known as the lead singer and lyricist of the heavy metal band Slipknot and hard rock/alternative metal band Stone Sour.
Taylor was also found, to possess the second-highest vocal range of any known singer in popular music with a range of 6,1 octaves. He was beaten only by Mike Patton (6 octaves).

I know some of his lowest notes are not sung notes.
I wasnt expecting all those whistle tones. It was a big surprise for me.
His high notes in chest voice have an INSANE quality.