I think it is a pick your flavor situation. They are all so different at the top and there is no Andrew Luck. I think the closest thing is probably Rosen, and Darnold could probably become that.
You you want a precise passer with perfect mechanics who is a unique personality? Rosen
You want a gamer with tools, but some unorthodox to his game, but wins? Darnold
You want the prototype, size, speed, arm strength that needs to be developed? Allen
You want the small overachiever, gamer, who you will have to alter your offense for but can win right away? Mayfield
You want the super athlete who can be a game changer eventually? Jackson
You want a slow, unathletic big guy from a mickey mouse offense with tiny hands, a weak arm and footwork issues? Rudolph
I think it just depends on what staffs are looking for.