Opeth
Opeth was formed in 1990 by David Isberg. Isberg asked Mikael Åkerfeldt to play bass guitar for Opeth without telling any of the other Opeth band members. When Åkerfeldt showed up to play with the band the next day, the band members refused to throw out their bass player for Åkerfeldt and all band members but Isberg and Åkerfeldt left to form a new band. Lots of new band members joined and left the band. Anders Nordin joined Opeth to play drums, Nick Döring to play bass guitar and Andreas Dimeo to play electric guitar. Döring and Dimeo left the band after one show and were replaced by Kim Pettersson on electric guitar and Johan DeFarfalla on bass guitar. DeFarfalla and Pettersson left Opeth after their next two shows and Peter Lindgren joined to play electric guitar.