Here I’ll go ahead and rank the best vocalists across multiple genres, in my opinion of course, based on range, overall skill, how unique their voice is, and how badass I think they are.

Normal/clean vocals:

• Steve Grimmett (Grim Reaper)
• Ronnie James Dio (Black Sabbath, Dio)
• Ozzy (Black Sabbath)
• James LaBrie (Dream Theater)
• Micheal Sweet (Stryper)
• Mark Osegueda (Death Angel)
• Sebastian Bach (Skid Row)
• Mike Howe (Metal Church)
• Layne Staley (Alice In Chains)
• Steve Tyler (Aerosmith)

Deathcore vocalists:

• Phil Bozeman (Whitechapel)
• Scott Ian Lewis (Carnifex)
• Mitch Lucker (Suicide Silence)
• Don Campan (Waking The Cadaver)
• Alex Erian & Steve Marois (Despised Icon)
• Ben Duerr (Shadow Of Intent)
• Alex Koehler (Chelsea Grin)
• Hernan Hermida (All Shall Perish)
• Lukas Nicolai (Mental Cruelty)
• Will Ramos (Lorna Shore)

Female Growlers:

• Angela Gossow (Arch Enemy)
• Yasmin Liverneaux (Face Yourself)
• Vicky Psarakis (The Agonist, Sicksense)
• Alissa White-Gluz (Arch Enemy)
• Tanya Beickert (Monochromatic Black)
• Emilly Beekmans (Volatile Ways)
• Sofia DeMasi (Torn Open)
• Britta Görtz (Hiraes)
• Fernanda Lira (Crypta)
• Lauren Hart (Arch Enemy)