Among the familiar names here are Marvin Gaye, Smokey Robinson & the Miracles, Marv Johnson, the Temptations and Four Tops – mainstays whose unique talent, when coupled with that of the company’s in-house songwriters, musicians and producers, empowered Motown during the 20th Century, and continues to ensure its legacy in the 21st. Among the unfamiliar? Michael Thomas, for one; Johnny Earl, for another. And the truth is that some of the others here – the Hit Pack, the Serenaders, Gino Parks – are barely known outside the circle of Motown aficionados.