1 Hansi Kürsch
Hansi Kürsch, born Hans Jürgen Kürsch, is the lead singer, lyricist, co-composer and bassist for German power metal band Blind Guardian . Heavily influenced by Freddie Mercury, he creates a huge choir effect by overdubbing his own voice multiple times in complex, overlapping vocal harmonies. He records each vocal track individually because harmonizers and "perfect pitch" programs don't work with his voice due to distortion and the natural double layer effects his vocal cords have .
His early technique made use of a more aggressive and harsher, "screaming" technique . ...read more. Hansi was a guest singer on 2 Edguy songs and singing with Tobias Sammet was great (Out Of Control, Vain Glory Opera).
I think Hansi was probably invited but he had several side projects after 2000 and was too busy (Demons & Wizards, Ayreon, and some smaller ones).
Update: this happened in 2019! (but the album was recorded in 2018).
You were all right that - I made this list in 2017 and yes: he's on their "next" album.
2 Tarja Turunen
Tarja Soile Susanna Turunen-Cabuli (born August 17, 1977), generally known as Tarja Turunen or simply Tarja, is a Finnish singer-songwriter. She is a soprano and has a vocal range of three octaves. ...read more.
3 Matt Barlow
Matthew 'Matt' Barlow is an American heavy metal singer and police officer. He was the lead singer for Iced Earth in the 1990s and 2000s. He is currently the lead singer for Ashes of Ares. After the September 11 terrorist attacks Matt Barlow decided to become a police officer and contribute to the "real ...read more.
4 Floor Jansen
Floor Jansen is a Dutch singer-songwriter and vocal coach. She is currently vocalist of Nightwish and leader of Revamp. She also was the singer of the band After Forever.
5 Jarkko Ahola
Jarkko Kalevi Ahola is a Finnish performing artist, composer and singer, best known as a metal singer. He is the vocalist, bass player and one of the three songwriters of the metal band Teräsbetoni. He also started a solo career as Ahola, a metal band. A great singer who needs more attention - singing for Avantasia can help him.
6 Fabio Lione
Fabio Tordiglione is an Italian singer and lyricist who has sung with many music bands including Rhapsody of Fire, Labyrinth, Ayreon, Angra, Vision Divine, Hollow Haze, Kaledon, Ancient Bards, and Athena.
7 Bruce Dickinson
Paul Bruce Dickinson, known professionally as Bruce Dickinson, (born 7 August 1958) 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.Outside his career in music, Dickinson has pursued a number ...read more.
8 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.
9 Simone Simons
Simone Johanna Maria Simons is a Dutch singer-songwriter. She is the lead vocalist of Dutch symphonic metal band Epica.
10 Daniel Gildenlöw
Daniel Gildenlöw is a Swedish musician and songwriter. He is best known as a multi-instrumentalist and vocalist for the progressive metal band Pain of Salvation.
The Contenders
11 Jonas Renkse
Jonas Petter Renkse is a founding member, songwriter, lead vocalist and ex-drummer of the band Katatonia, founding member, songwriter, bassist, backing vocalist, ex-guitarist of the band Bloodbath. He isn't well known but his voice is so awesome (Katatonia).
12 Devin Townsend
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. He's got an incredible operatic voice with a 5 octave vocal range.
13 James Labrie
Kevin James LaBrie is a Canadian vocalist and songwriter, who is best known as the lead singer of the American progressive metal band Dream Theater.
14 Kobra Paige
Kobra Paige is a Canadian singer and songwriter. She is the founder, lead singer, and songwriter for the hard rock and metal band Kobra and the Lotus. She is also a guest vocalist for Kamelot and Metal All Stars. Classically trained metal singer.
15 Timo Kotipelto
Timo Antero Kotipelto is the vocalist of the Finnish power metal band Stratovarius and is the creator and vocalist of the power metal band Kotipelto.
16 Tommy Karevik
Tommy Karevik is a Swedish metal vocalist, best known as the singer for metal bands Seventh Wonder and Kamelot.
17 Clementine Delauney
Clémentine Delauney is a French symphonic metal singer. She is a classically trained soprano, known as the singer for Austrian symphonic metal band Serenity, currently Visions of Atlantis, and French metal opera band Melted Space.
18 Elize Ryd
Elize Ryd is a Swedish singer-songwiter, dancer, composer and show artist, best known as one of the three vocalists in the melodic metalcore/power metal band Amaranthe.
19 Matt Smith
20 Cristina Scabbia
Cristina Adriana Chiara Scabbia is an Italian singer and lyricist, best known as one of the two vocalists in the Italian Gothic metal band Lacuna Coil.
21 King Diamond
Kim Bendix Petersen, better known by his stage name King Diamond, is a Danish heavy metal musician. He is known for his extensive vocal range, usually sung in falsetto. King Diamond was originally known as the vocalist for Mercyful Fate, but has become notorious for his horror themed Concept albums ...read more.
22 Geoff Tate
Geoff Tate is a German-born American singer and musician who rose to fame in the 1980s with the progressive metal band Queensrÿche. He was already invited and sang on at least 2 albums
23 Stu Block
Stuart "Stu" Block is a Canadian singer-songwriter, who was the frontman for Canadian progressive death metal band Into Eternity, and is now the lead vocalist for American heavy metal band Iced Earth.
24 Ralf Scheepers
Ralf Scheepers is the vocalist for German heavy metal band Primal Fear. He has a relatively high-pitched tenor-esque singing voice and sometimes uses a shriek reminiscent of Judas Priest's Rob Halford, although it is his baritone lows which give him a near four-octave range in the modal register.
25 Tom Englund