I think he’d bring the conversation to a new level. I’m not sure what he could bring to the table but it would be at the very least amusing. I think Einstein and King would blow (no pun intended) Wayne away in the conversation.
Einstein and King were real people. Wayne was a phonie. He wasn’t in the war and never did anything heroic, but people see him as a war hero and real man. If you are going to invite a phonie actor then he should be one who acted on stage and played a great man. Those kind of actors are much more intelligent than John Wayne types.
Wayne doesn’t really fit with the other two, but I’d have him join just the same. I hear he was a great story teller. Never met the man, but I live near his Newport Beach house. I know people that knew him.