I'd like to add two to this impressive list:
Lenny Wolf (Kingdom Come): Writing, producing, singing and playing guitar, bass en keys. Too bad he slipped into retirement.
Dan Swanö (Nightingale, Witherscape): Next to his numerous extreme bands and his work as a producer on countless albums, he made very strong Prog albums with Nightingale and Witherscape. He plays drums, guitar, bass and ke