Member:
NA- Impellitteri - vocals  
1987 Impellitteri - vocals  
1988-1990 Driver - vocals (as Rob Rock)  
1991 Axel Rudi Pell - vocals  
1992-2000 Impellitteri - vocals  
2000- Rob Rock - vocals  
2001-2004 Warrior - vocals  
2008- Impellitteri - vocals  
2008- Driver - vocals (as Rob Rock)  
Guest musician:
2001-2002 Avantasia - vocals  
2011 Wolfpakk - vocals  
2013 Timo Tolkki's Avalon - vocals