In our 244 year history there are really only two legends that are truly pieces of Americana. John Wayne is one but he has been eliminated. Some people will argue that The Fonz is another but I'd disagree. That leaves us with only one possible answer:
Liberace
To each his own. I have him slightly above the guy from Flock of Seagulls who held down one key and stared at the camera.
I knew it wasn't Steve Winwood because you didn't mention singing. I thought you were going to pick that dude from Yes.