What would really help is if teams think he can play OG as well. Guys like Pocic and Elflein may go a rd or two higher than they would because they are flexible enough to play anywhere along the interior.
In any case, OC's usually don't get drafted very high. But that's certainly not a knock against Toth. He's such a great locker room guy and is one of the best technicians in this draft. He'll be drafted and have a nice long career.