There have been a lot of artists who've supported Bon Jovi who were very popular acts who wouldn't have to be a support act if they didn't want to--Daughtry, Nickelback, Kid Rock, Matchbox 20, Goo Goo Dolls, Sheryl Crow, Van Halen, etc... They may not be your personal cup of tea, but they're definitely more than "half decent bands" if their record sales are any indication.