Obviously the gap in class should be too much for Hill to surmount, but I could see him at least nicking maybe a few rounds just by staying on the outside and keeping his jab pumping without giving too many countering opportunities away. He wasn't as purely mobile as Pastrano though, not that Johnson was prime for that fight anyway, nor was Hill quite as good as the focused version of Pastrano imo.
Harold Johnson for sure. His jab, counterpunching, and subtle defense would have been more than enough to outbox Hill silly.