Hilmer was a good, solid fighter, but I think Pryor would have beat him badly. Davis Jr at his best would probably win a clear decision.
Pryor would probably beat Hilmer in a close decision, too much pressure exerted for Hilmer to execute.Howard could possibly beat Hilmer over the stretch, but Hilmer did much better against Vilomar than he did. so I'm going with Hilmer by majority decision.