This list will only include the lead vocalist from any band in the original grunge genre (sorry post-grunge) only one vocalist per band as well. Last point we are only focusing on the artists vocals and voice not any other musical talents.
The Top Ten
1Chris Cornell - SoundgardenChris 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. He died on May 17, 2017.
The best singer is the singer with the best vocal skills and his skills are the best in grunge. Very close 2nd best - Layne Staley. Ask any vocal coach. - Metal_Treasure
2Layne Staley - Alice in ChainsLayne Thomas Staley was an American musician who served as the lead singer and co-songwriter of the rock band Alice in Chains, which he founded with guitarist Jerry Cantrell in Seattle, Washington in 1987. Alice in Chains rose to international fame as part of the grunge movement of the early 1990s. ...read more.
Awesome singer - bobbythebrony
3Eddie Vedder - Pearl JamEddie Vedder is an American musician, singer and songwriter best known as a member of the rock band Pearl Jam, with whom he performs lead vocals and is one of three guitarists.
4Kurt Cobain - NirvanaKurt Cobain was born February 20, 1967, in Aberdeen, Washington. In 1987, he started the grunge band Nirvana. 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 Seattle home in 1994.
HOW is he better than Layne Staley his screams are awful. - christangrant
Oh man... Kurt was a legend! He deserves to be number 1! - SuperCharged
He's just overrated because of his early death. Chris Cornell is much better than him, and Kurt absolutely don't deserve a number one place on any list... - somekindofaguy
He is a legend! - SuperCharged
5Scott Weiland - Stone Temple PilotsScott Weiland is an American singer, musician, and composer for the American grunge band Stone Temple Pilots.
6Andrew Wood - Malfunkshun
7Billy Corgan - Smashing PumpkinsWilliam Patrick "Billy" Corgan Jr. is an American musician, songwriter, producer, television writer, poet, and professional wrestling promoter best known as the lead singer, guitarist, and sole permanent member of The Smashing Pumpkins.
8Black Francis - PixiesCharles Michael Kittridge Thompson IV is an American singer, songwriter and guitarist. He is best known as the frontman of the influential alternative rock band Pixies, with whom he performs under the stage name Black Francis.
9Mark Arm - Mudhoney
10Thom Yorke - RadioheadThomas Edward "Thom" Yorke is an English musician best known as the singer and principal songwriter of the alternative rock band Radiohead.