In no particular order
Jimmy Smith- still can play, and I think would be a Micah Hyde type player, in that, we all know he's a good player, but with good scheme and coaching, he'd be possibly pro bowl level.
Arik Armstead- good fit for our defense. He'd allow us to focus on offense in the draft, and be a really solid pass rusher for our team.
Austin Hooper or Darryl Williams- in Hooper it would give Allen a reliable target over the middle. Only thing is it cuts into Knox reps. I love Knox, but we gotta maximize our offense especially while Allen is on his rookie deal. Williams can still play. Yes, he has injury history, but I truly believe in our staff and keeping guys healthy. He's versatile, and would allow Cody Ford to move inside to guard, where I think, he'd really flourish.
Let me also predict we move up in the draft. I guarantee you we end up with Jeudy, Lamb, or Ruggs. No way Beane leaves this draft without a stud WR.