#1 WWE Tag-Team Champion Dolph Ziggler
Anyone surprised that Dolph Ziggler is number one on this list of WWE Superstars who could knock out Logan Paul clearly hasn't been paying attention. Ziggler may have an unthreatening name and a less-than tough-guy character in WWE but he's arguably the most accomplished real fighter WWE has on their roster.
Ziggler is an extremely successful amateur wrestler who still holds the high school and college records for the highest number of pins. He also trained as a boxer when he was younger as well.
Ziggler is such a proficient wrestler, with a decent striking game, that it shouldn't be difficult for him to overcome most trained wrestlers, as indeed he did when he was at high school and college, let alone someone with absolutely no training at all like Logan Paul.
For that reason, I'm fairly confident that Nicky from the Spirit Squad could knock out Logan Paul and show Floyd Mayweather how it's done.