There's so much more to Richard Penniman's catalog beyond the ‘50s sides for which he's most widely known. The breadth of his piano-belting classics is already uncontainable, but his later forays into R&B, his wild-eyed takes on classics—from the Stones to ‘20s jazz pop—and his funk excursions in the ‘70s all proved that he wasn't just The Emancipator of Rock 'n' Roll but one of its most prolific and visionary innovators, too.