1 Chuck Schuldiner
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.
Sorry I didn't mention in the list description that people on this list must be Lead Vocalists but not necessarily Lead Guitarists - they can be Rhythm Guitarists or play both Lead and Rhythm Guitars. - Metal_Treasure
2 Mikael Åkerfeldt
Lars Mikael Åkerfeldt is a Swedish musician, prominently known as the lead vocalist, guitarist, and primary songwriter of progressive death metal band Opeth, as well as being the former vocalist of death metal supergroup Bloodbath for three albums up until 2012. ...read more.
3 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.
Very talented in both ways. - Userguy44
Vocals and rhythm guitar - Metal_Treasure
Adam Nergal Darski (born Adam Michał Darski; 10 June 1977 in Gdynia), is a Polish musician and television personality, best known for being the frontman for the black/death metal band Behemoth. ...read more.
Vocals, lead AND rhythm guitar - Metal_Treasure
5 Dave Mustaine
David Scott "Dave" Mustaine (born September 13, 1961) is an American musician, singer, songwriter, actor and author. Mustaine is best known as a pioneer in Thrash Metal, being the former lead guitarist of Metallica before his dismissal in 1983, leading to finding and becoming the front man of his own ...read more.
Not very high because:
1) thrash is an extreme genre but most of Megadeth songs aren't thrash
2) he's a very good guitarist but not a very good singer - Metal_Treasure
6 Joe Duplantier
Joseph "Joe" Duplantier is a French musician best known as the guitarist and vocalist of metal band Gojira.
7 Piotr Wiwczarek
Piotr Wiwczarek (also known as Peter) is a Polish guitarist and vocalist who is best known as the frontman for death metal band Vader, where he is the only constant member of the band since its inception.
8 Karl Sanders
Karl Sanders is an American musician, most widely known as the founding member of the American ancient Egyptian-themed technical death metal band Nile.
9 Muhammed Suiçmez
Muhammed Suiçmez was born in Karlsruhe, Germany, to Turkish immigrants. He is the frontman and guitarist of the German technical death metal band Necrophagist.
Deep guttural vox, fast and technical guitar style - Metal_Treasure
10 Alexi Laiho
Alexi "Wildchild" Laiho is a Finnish guitarist, composer, and vocalist. He is best known as the lead guitarist, lead vocalist and founding member of the melodic death metal band Children of Bodom, and is also the guitarist for Sinergy, The Local Band and Kylähullut.
Lead vox + lead G + rhythm G - Metal_Treasure
11 Steffen Kummerer
Steffen Kummerer (born June 1, 1985) is a German guitarist, multi-instrumentalist and producer. He is the leader, main songwriter, vocalist, and guitarist for the (technical) death metal band Obscura as well as the black metal band Thulcandra.
His guitar work is like a watchmaker work. His growls are deep, actually deeper than the average in the subgenre. His cleans are decent although he doesn't use cleans very often. - Metal_Treasure
12 Mille Petrozza
Miland "Mille" Petrozza is a German metal guitarist and singer of Italian descent, who has been the lead vocalist and guitarist for the German thrash metal band Kreator since 1984.
13 Max Cavalera
Massimiliano Antonio "Max" Cavalera is a Brazillian singer, guitarist, and songwriter who currently plays in heavy metal bands Soulfly, Cavalera Conspiracy, and Killer Be Killed.
Ihsahn is a Norwegian composer, multi-instrumentalist, and vocalist. He is best known for his work with Norwegian black metal band Emperor.
Tomas Börje Forsberg, known by the stage name Quorthon (1966-2004), was a Swedish musician. He was the founder, songwriter, vocalist and guitarist of the band Bathory, which pioneered the black metal genre and is credited with creating the Viking metal style. A multi-instrumentalist, Quorthon wrote ...read more.
16 Dallas Toler-Wade
from Nile - Metal_Treasure
17 Luc Lemay
18 Peter Tägtgren
Alf Peter Tägtgren is a Swedish musician, multi-instrumentalist and producer. He is the founder, main songwriter, lead vocalist, and guitarist of the death metal band Hypocrisy as well as the industrial metal band PAIN in which he is the only member.
19 Thomas Gabriel Fischer
Thomas Gabriel Fischer, earlier known by his stage name of Tom G. Warrior, is a Swiss metal musician. He best known as the frontman for extreme metal bands Hellhammer, Celtic Frost, and Triptykon.
Aka Tom G. Warrior / Celtic Frost - Metal_Treasure
20 Tom Angelripper
Thomas Such, better known by his stage name Tom Angelripper, is the founding member and main songwriter of German thrash metal band Sodom.