Introduced by Elvis Presley in 1976 as "quite simply, the greatest singer in the world," Roy Orbison—with his lush, dramatic orchestral songs and near-operatic voice—helped expand the sonic and emotional limitations of pop music. His most influential material came from his work during the early to mid-1960s, and his songs "Only the Lonely," "Running Scared," "It's Over," "Down the Line," "Cryin'," and "In Dreams," among others would support his career for decades. Although Orbison's stage show would remain essentially the same from the mid-1960s until his death in 1988, he insisted that he didn't tire of repeatedly singing the same songs. "Gracious, no, because I've worked a lifetime to do a show of just my own material," Orbison told Radio Two, according to Alan Clayson in his biography Only the Lonely. Orbison credited the lasting impact of his music to a certain...