The obvious are pretty much covered but i reckon Charlie Burley would have had a fair punch when around the weight, which was probably his best natural weight. On a less successful level of practitioner Gary Guiden and Charlie Weir, both Davey Moore victims, had a pretty decent wallop.
It would have been interesting Ayala vs. Hearns or Duran, as far as the legends, and Moore and even Drayton. I think Hearns and Duran beat him.. Duran would have been made for the Ayala style.
Oscar " shotgun " Alvarado could hit a bit, enjoyed reading about him in the early to mid 70s. keep well.