The Taylor that beat Aaron Davis would school that football player. Bum ass Broner, in the ONLY time he let his hands go in the fight, showed that Shawn could be vulnerable to quickness and accuracy. Taylor would light him up, in all honesty. Beats him more impressively than Brook, Thurman, and Spence did.
Davis would beat Porter. And of course, if we're talking Taylor victims, McGirt would beat ten shades of shit outta Porter.
Porter was drained from sucking down to a catchweight for that fight, though, and the KD came after Broner had tired him out by octopussing him all night long. I can see a scenario where Taylor would simply be too fast for Porter, but I can also see Taylor lacking the kind of power that fighters who've beaten Porter thus far have had and being unable to discourage him from imposing his strength.