I think Usman and then Colby would be the tougher fights.
I predict that unless one or both fighters feel the real need to be exciting (which they very well may) that Tyron will play the game not to lose (He's turning into an MMA version of Floyd). I see a 5 round decision, close but fair decision win for Woodley.
but this is MMA, I'm sure Daren Till ends up KO flying superman Tyron in the first 10 seconds or something.
Edit: Actually I'm too harsh on Woodley. His last 4 fights were 2 super boring fights. 1 fight of the night. and one 1st round KO of the champ.