Out of the three most likely candidates for title challenger I see Till as the worst match-up for him. I'd pick Colby if i was Tyron.
Colby is easy money, he is basically Tyron-light (not light as in colour, no racist lol).
RDA he can bully and wrestlefuck, and i don't think Tyron gives much away on the feet to RDA. However RDA is an accomplished all rounder and does poses a threat on the feet, against the cage (crazy flurries) and with his sub game.
Till is a bit of an enigma when it comes to his TDD and what he could do from a counter wrestling perspective. However Till has the striking chops and aggression to pressure and KO Tyron. Maybe Tyron wrestle fucks him, maybe not - but he is definetely at threat of the KO anytime it's standing.