Montrose is my vote. As Thunderhead already stated WAY ahead of it's time! Songs like Hot, Sweet, and Sticky, Rock the Nation, Space Station #5, One Thing On My Mind and Good Rockin' Tonight just flat out kicked ass.
Isn't it ironic that the album's lead singer would go on to be the frontman in VH,one of the choice's here. Sammy was the man then and he went on to be the man in VH. WAY, WAY ahead of their time.