I suspect that all 4 (including Nix) will be drafted in the top 10, although Nix could last a couple of more spots, but not more).
Evaluations may change before the draft, but I would not be shocked to see someone draft Nix in the top 5 to make sure that they get their top QB prospect.
And that’s the reason you don’t screw around by thinking you can trade back and still get the player you really want. I want any of the top 3 QB’s but if for some reason they had Nix rated better than any of them then I would rather see them take him at 3 than to trade back and watch another team jump up and take him, and the Patriots end up with the worst QB’s in football for the foreseeable future.