People like to slob Lennon's knob but I think it was McCartney. He's a little too "pop" for my liking but he managed to stay somewhat relevant for a long time. I think Starr was along for the ride and I'm just not sure about Harrison. He did the thing with Petty, Orbison, Dylan and some other slug, the Traveling Wilburys, and people thought "Yeah, Petty, Dylan, Orbison and two other dudes." Maybe he was just a background guy.