With his genre-defying catalog of music, the late Leon Russell always incorporated elements of rock, pop, country, blues, gospel and folk. In today’s musical landscape, he’d be an Americana tastemaker ...

If ever there was a riches to rags—and back to riches—rock and roll tale begging to be told, the decades-long odyssey of Leon Russell would be it. A hugely influential piano visionary, bandleader, ...