In theory 11508, TheInsideGambit  makes a few good points. My solid pick for RJ is still Hafner, but if it's someone not on the list of 7, my money would be on Oscar Ardilles. He would definitely be a character where we look back and say, "OK, yes, I see that..."

He matches a lot of hints.

I still think it's Hafner, but Oscar is my wild card.