The answer is Worthy, as others have said, but one thing here is that I think 'doubling' is going to mean different things for Mitchell and Worthy.
For Mitchell, you can bracket him and take away the standard route tree.
For Worthy, it's going to require more from the game plan, formations, and secondary communication, because Sark is going to move him around. Our goal is to get him the ball in space. He's going to motion a lot and will almost certainly catch several screen passes in the game. He's also good running routes down the field of course. It's like guarding a Steph in basketball - he creates gravity that demands attention all the time, not just a double while he has the ball.
TCU this year tried to play Worthy straight up with a future NFL draft pick in Josh Newton and Worthy absolutely abused him.
I really trust all four of our top guys, but Whittington and Sanders are the best at finding soft spots on medium-to-long money downs
Personally, I view Worthy similarly. I think he'll rise on boards and that our fanbase somewhat underrates him because of some pretty bad moments last year and some NIL shenanigans. I definitely think he'll go ahead of Mitchell. It's still too early for a lot of the draft mocks and analysts to have caught up to the season