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.
Bruce Dickinson: Paul Bruce Dickinson, known professionally as Bruce Dickinson, is an English musician, airline pilot, and broadcaster.
Marco Hietala: Marko Tapani "Marco" Hietala is a Finnish heavy metal vocalist, bass guitarist and songwriter.
Jari Maenpaa: Jari Mäenpää born 23 December 1977 is a Finnish heavy metal multi-instrumentalist and songwriter.
Roy Khan: Roy Sætre Khantatat, is a Norwegian singer-songwriter. Commonly known as Roy Khan or simply Khan.
Hansi Kursch: Hansi Kürsch, born Hans Jürgen Kürsch, is the lead singer, lyricist, co-composer and bassist for German power metal band Blind Guardian .
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Michael Kiske: Michael Kiske is a singer best known as the former lead vocalist for the German power metal band Helloween.
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Ronnie James Dio: Ronnie James Dio born Ronald James Padavona; July 10, 1942 – May 16, 2010 was an American heavy metal singer.
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Rob Halford: Robert John Arthur "Rob" Halford is an English singer and songwriter.
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Tobias Sammet: Tobias Sammet is a German metal musician, best known as the vocalist and primary songwriter of the power metal band Edguy.