I bet on Helenius at the odds. Looks foolish in hindsight, I didn't realize Helenius chin was that bad he couldn't eat a glancing blow from Wilder without being concussed.
Inside the top 5? Joshua. I don't think he beats any of the other fighters. And I would probably favor AJ in that matchup. But both are glass canons so it'll be whoever lands first. But AJ is better than Helenius by a longshot.
Usyk is a very bad match-up for Wilder, who'll be swinging at air all night while getting strafed with left hands. Usyk probably stops him at some point.