I think Hero can still work. He needs a better gimmick and look for where he is tho.
He can definitely still work. The gimmick only works if you take it seriously - i.e. have him start knocking people out - but considering that NXT has a legitimate one-hitter quitter in Aleister Black and a legitimate MMA guy in Matt Riddle, it's hard for him to corner the market (see: Sonya Deville when Ronda Rousey exists, and Baszler and her crew are waiting in the wings) on such a gimmick.
The jerseys are cool and all, but he shouldn't be wrestling in them. Entrance attire is fine. But for obvious reasons he's wearing them so whatever. I don't really mind him being a bigger dude - works for Kevin Owens - but KO does at least have some semblance of muscular definition and he dresses the part. Ohno doesn't carry it as well as KO or even Dain.
Now, if he wanted to turn some of his fat into muscle and just become a head-hunting brawler type (see: Ishii, Takayama, Hansen, etc.) you might have something, but he's legitimately a technical marvel. That's what bothers me so much about where he is. Skill-wise, you could barely count on one hand people more knowledgeable/better at the craft than he is.