A reluctant vote for Frank. No question Elvis had more raw talent and was more of an innovator, but after 1968 Elvis became a caricature of himself. He was never able to evolve, and his choices for movies was the worst. Old Blue Eyes, on the other hand stayed on top of his game almost until the end of his career. He was great in the movies, and he had the good sense to evolve and recognize other talent younger than he, e.g. his comment that George Harrison's "Something" was the greatest love song of all time. Also no one has or had the ability of prasing that Frank had. Elvis may have been king, but we do not live in a monarchy. Better to be Chairman of the Board than King any day.