Even 4-12 may not land you a top 4 pick this year - Giants, Browns, 'Niners, Bears, Chargers, Colts, Saints, Dolphins (and more) all may have something to say about that. Do we really want to waste a ton of draft capital to move up all those spots.
We can't expect the players or coaching staff to "tank". I actually give them a ton of credit for playing hard. People are just "disappointed" because we knew this team was going to be really bad heading into the season and as the Jets luck would have it, they choose to rebuild in a year where there are a ton of bad teams in the league.
Giants- Manning will be 37 during the 2018 season and they drafted Davis Webb in the 3rd round. They have a rough schedule and are not likely to win more than four games, but they have a bevy of big time defensive players. This situation doesn't strike me as one that would result in them drafting a QB in the 1st round.
Browns- We don't know for sure yet, but they may have their future QB already.
49ers- if they acquire Kirk Cousins, then they are not drafting a QB
Bears- if they have a top 4 pick, they are not using it on a QB
Chargers- Rivers will turn 37 late in the 2018 season. This is definitely a team that could draft a QB in the first round. Would Rivers then be traded?
Colts- I liked Jacoby Brissett in college. With him and Luck on the roster, I don't envision the Colts drafting a QB.
Saints- I suppose they could move on from Brees after this season.
Dolphins- This team could definitely draft a QB.
I think if the Jets go 4-12, they could land a QB without trading up. 5-11 is even possible.
6-10 or better with no playoffs is rough.
If the Jets get to 5 wins before December and the college QBs start to show for sure that they are locks to be good in the NFL, then I will be worried. Right now I am not because the Jets only have 3 wins and the college QBs are all showing flaws. Sam Darnold has some sloppy mechanics (Kosar and Rivers threw sloppy but had success; others like Leftwich and Bortles had/have issues in this way) and might not even be in the 2018 draft, Josh Rosen has a personality and cockiness that could be a real problem especially in NY/NJ, Josh Allen hasn't looked good partially due to shaky teammates, Lamar Jackson has had some struggles against good teams, etc. As of this moment, I don't know how to rank these fellows.