Dan Penn loves to sing. But more often than not, other singers are singing the songs he’s written. A master tunesmith, Penn created a poignant catalog of soul classics. He and his fellow Alabamian, keyboardist Spooner Oldham, co-wrote James and Bobby Purify’s “I’m Your Puppet,” Janis Joplin’s “A Woman Left Lonely” and the Percy Sledge hits “It Tears Me Up” and “Out of Left Field.” Penn’s collaboration with Memphis producer and studio owner Chips Moman yielded A...