Focusing on Olivia Newton-John in workout clothes is understandable but misses the point. Yeah, he did that solo, but also appeared, uncredited, on at least three Van Halen albums. He's played with all of Asia and half of King Crimson. He's played on Steely Dan records. Toto was, essentially, the backup band for all of Thriller, not just Beat It.
Electric, acoustic, rock, metal, jazz, funk, blues... I wasn't kidding, he can play ANYTHING.