Williams because he can take the top off the defense at any moment. Wilson is the guy who will move the sticks. Williams won't catch many balls but he can take it to the house any time he catches it (Olave is a stud who can do both.) Just having Williams out there is a threat. He keeps the defense honest because the defense is afraid to leave their corner 1 on 1 with him. If Olave and Wilson get extra coverage shifted their way, that's when Williams burns you deep.
Like I said, he'll probably only catch around 20 balls but he'll still make some game breaking plays.