It's difficult not to pick O'Neill right now, he's made a lot of shows and won 2 tournaments one being a major. WRW has been consistant and he's right on O'Neill's tail.
If I were to pick someone outside of the current top 5, I might take "The Natural" Ryan Ciminelli. Every time he's on a show with Urethane, I am impressed. He just needs to get that Urethane ball to kick out the 7 pin.