Please note there is a key difference between growling and screaming. Growling is more guttural and uses more of the throat, where as screaming uses more of the lungs and is often higher pitched than growls.
This also isn't listing off who can scream the best, just who can scream the most aggressively. These guys are known for unleashing the most raw and anger inducing screams on the planet.
1 Devin Townsend (Strapping Young Lad)
Devin Garret Townsend is a Canadian musician, songwriter and record producer. He was the founder, songwriter, vocalist, and guitarist in extreme metal band Strapping Young Lad from 1994 to 2007 and has an extensive career as a solo artist.
Definitely aggressive beyond belief, so much raw power and anger. - kempokid
Best Examples: The entirety of Oh My F God and S-storm, the ending scream in Thing Beyond Things - cjWriter1997
Yes, his screams are remarkably aggressive.
He's a very versatile vocalist with unique vocal skills - he can scare you to death and then sing you to sleep. Not to mention his vocal range of 5 octaves. - Metal_Treasure
2 Chino Moreno (Deftones)
Chino Moreno is an American musician. He is best known as the lead vocalist and contributing guitarist of Deftones.
Best Examples: Fireal, When Boys Telephone Girls, Rats! Rats! Rats! - cjWriter1997
3 Mike Patton (Faith No More)
Michael Allan "Mike" Patton is an American singer-songwriter, multi-instrumentalist, film composer, producer, and actor, best known as the lead singer of the alternative metal band Faith No More.
Oh yes, Mike deserves to be in the top ten. Thanks to whoever added him. - cjWriter1997
Just listen to Jizzlobber to get a full overview of his aggression, along with Irony is a Dead Scene by the Dillinger Escape Plan - kempokid
4 Phil Anselmo (Pantera)
Philip Hansen "Phil" Anselmo is an American musician who is best known as the former lead vocalist of the heavy metal band Pantera. He currently is the vocalist of heavy metal bands Down and Superjoint Ritual.
Best Examples: Suicide Note Pt. 2, Use My Third Arm, The Great Southern Trendkill - cjWriter1997
5 Chuck Schuldiner (Death)
Charles Michael "Chuck" Schuldiner (1967-2001) was an American singer, songwriter, and guitarist, best known as the founder and vocalist, guitarist and bassist of the American heavy metal band Death. He is considered the most influential figure in Death Metal, with some publications referring to Chuck ...read more.
Best Examples: Spirit Crusher, Flesh and the Power It Holds, the Painkiller cover - cjWriter1997
6 Dimitri Minakakis (The Dillinger Escape Plan)
Best examples: The entire Calculating Infinity Album - cjWriter1997
7 Kurt Cobain (Nirvana)
Kurt Cobain was born February 20, 1967, in Aberdeen, Washington. In 1987, he started the grunge band Nirvana, which became one of the most successful bands ever. He was a talented yet troubled grunge performer. Kurt Cobain became a rock legend in the 1990s with his band. He committed suicide at his ...read more.
Best Examples: Territorial Pissings, Scentless Apprentice, tourette's - cjWriter1997
8 Maynard James Keenan
Maynard James Keenan, often referred to by his initials MJK, is an American musician, record producer, winemaker, and actor, best known as the vocalist for Grammy Award-winning progressive metal band Tool.
While he barely screams, even his normal singing can sound unusually aggressive, and Ticks and Leeches has some amazing vocal work - kempokid
Best Example: Ticks and Leeches - cjWriter1997
9 Corey Taylor
Corey Todd Taylor was born in December 8, 1973. He is an American musician, author, and actor best known as the lead singer and lyricist of the Nu-metal band Slipknot and hard rock/alternative metal band Stone Sour.
Best Examples: Eyeless, Metabolic and the ending to Scissors - cjWriter1997
10 Page Hamilton (Helmet)
Best Examples: In the Meantime, Murder - cjWriter1997
11 Zack de la Rocha (Rage Against the Machine)
Zacharias Manuel "Zack" de la Rocha (born January 12, 1970) is an American musician, poet, rapper, and activist best known as the vocalist and lyricist of rap metal band Rage Against the Machine from 1991–2000, and after the band's reunion in 2007 until their last show in 2011. He left Rage Against ...read more.
Best Examples: The endings to both Freedom and War Within Breath - cjWriter1997
12 Chester Bennington
Chester Charles Bennington (March 20th, 1976 - July 20th, 2017) was an American musician, singer, songwriter and actor, best known for being the lead singer of Linkin Park. He also participated in side projects like Julien K and Dead By Sunrise. He committed suicide in 2017 after a period of depression. ...read more.
Best examples: No More Sorrow, Given Up, Bleed it Out, War, One Step Closer, From the Inside, Somewhere I Belong, Lost in the Echo, Victimized, Morning After, Walking in Circles, The Catalyst, Fire, End of the World, Condemned, Inside of Me, Crawl Back In, Papercut, Breaking the Habit, Numb, In The End, By Myself, Don't Stay, Out of Time, Black Heart, Same on the Inside, Cry Cry, Figure.09, With You, Blackout, and more. - CaptainMowzker
13 Randy Blythe (Lamb of God)
David Randall "Randy" Blythe is the vocalist and lyricist of American heavy metal band Lamb of God and side-project band Halo of Locusts.
14 Chris Cornell
Christopher John "Chris" Cornell was an American rock musician and singer-songwriter, best known as the lead vocalist, primary songwriter and rhythm guitarist for Seattle rock band Soundgarden and as former lead vocalist and songwriter for the supergroup Audioslave. His vocal range was C2 to A5, while ...read more.
Outshined - Userguy44
15 Tyler Joseph
Tyler Robert Joseph is an American musician, singer-songwriter, and rapper. He is best known as the lead vocalist and keyboardist for American musical duo Twenty One Pilots.
He screams in Jumpsuit. - Userguy44
16 Henry Rollins
17 Rob Halford
Robert John Arthur "Rob" Halford is an English singer and songwriter, who is best known as the lead vocalist for the Grammy Award-winning heavy metal band Judas Priest and famed for his powerful wide ranging operatic voice.
18 Cathal Deschutes (One Nights Anger)
19 Jonathan Davis
Jonathan Howsmon Davis, also known as JD and JDevil, is an American musician best known as the leading vocalist and frontman of the nu metal band Korn.
20 Seth Putnam (Anal C***)
21 Shaun Morgan
Shaun Morgan Welgemoed, known publicly as Shaun Morgan, is a South African musician and singer for the post-grunge/alternative metal band Seether.
22 Aaron Lewis
Aaron Lewis is an American musician, who is the lead vocalist, rhythm guitarist, and founding member of the rock group Staind, with whom he has released seven studio albums.
23 Tom Araya
Tomás Enrique "Tom" Araya Díaz is a Chilean American musician, best known as the bassist and vocalist of the American thrash metal band Slayer.
24 Bruce Dickinson
Paul Bruce Dickinson, known professionally as Bruce Dickinson, is an English musician, airline pilot, and broadcaster. He is most well known for being the lead singer in heavy metal band Iron Maiden and his solo career.
25 James Hetfield
James Alan Hetfield was born on August 3, 1963. He is an American musician, singer and songwriter known for being the co-founder, lead vocalist, rhythm guitarist and main songwriter for the American heavy metal band Metallica.
26 Benjamin Burnley
Benjamin Jackson Burnley IV is an American musician, composer, and producer, best known as the founder and frontman of the American rock band Breaking Benjamin.
27 David Draiman
David Michael Draiman is an American songwriter and the vocalist for the band Disturbed as well as for the band Device.
28 Dave Grohl
David Eric "Dave" Grohl is an American rock musician, multi-instrumentalist, singer, songwriter, producer and film director. He is best known as the former drummer of the hugely popular 90s grunge band Nirvana and the vocalist/guitarist for the alternative rock band Foo Fighters. He has sat behind the ...read more.
29 Sully Erna
Salvatore Paul "Sully" Erna is the American vocalist and guitarist for the American hard rock band Godsmack.
30 Ivan L. Moody
Ivan L . Moody, known by the pseudonym Ghost during his time with Motograter, is the lead vocalist for American groove metal band Five Finger Death Punch from Las Vegas, Nevada .