I consider Hearns the H2H best at 154, and I pick him to beat both. I think Benvenuti vs McCallum is 50-50, and I think McCallum, despite his legend, was closer to Benvenuti's level than he was Leonard, Hagler, Hearns, Monzon level. In fact, I actually think Benvenuti wins a close one here.
For whatever it's worth, both McCallum and Benvenuti would beat the fuck outta Norris, since Terry is often considered a top 3 junior middle.