It looks like Ben is the best UDL candidate to bring in votes from the center.
All well and good assuming he's not just eliminated immediately from low first preferences. I admit that would be a problem for any UDL candidate though, I suppose.
Certainly, though I assume if Ben won the nomination the UDL would unite behind him. While the JCP has more total members, giving Oakvale a paper advantage over his left-wing opponent, the UDL has a larger number of active participants which would, in this scenario, make it a Ben vs. Tmth election.