Young gospel phenom, gritty Stax/Volt soulster, compelling balladeer, chart-topping disco king, Southern soul-blues stalwart -- Johnnie Taylor somehow always managed to adapt to the times, and he parlayed that versatility into a recording career that lasted nearly four decades. Nicknamed the "Philosopher of Soul" during his Stax days, that version of Taylor is best remembered for his 1968 R&B chart-topping smash "Who's Making Love," but far and away his biggest success was 1976's across-the-board number one "Disco Lady," the first single ever certified platinum (which at the t...