Quote: Paul was irritable, anxious and inconsistent, and "full of shit." If he'd been an invention, he would have been "smoother" and more consistent. I doubt he would have been portrayed as at odds with the Nazarenes.
Assuming that the "paul" of Marcion was identical to the "paul" which emerged after his makeover by the proto-orthodox...to borrow Ehrman's title for them. We also have the "paul" of Acts which I guess we can dismiss as a figment of someone's imagination.
But, I don't know why any literary figure has to be "white bread." A few warts make him more interesting. Certainly Yahweh is a bloody old bastard. Talk about warts!