There are some artists who strictly defy genres. Think of Roy Orbison. Yes, he was one of the famed artists on Sun Records, but what was he really? Was he rockabilly? Pop? Country? Easy Listening? In my mind, the closest term to describe Roy Orbison’s music is the one Bob Dylan coined for him: “cowboy opera.” Orbison’s voice was a river of silk floating through the grit and dry heat cacti. And while I know that M. Ward is no Roy Orbison (although he did …