The way QB salaries go right now I don't think it would make a difference. Not making excuses for Dak but it's clear he does not have the protection, running game, or receivers outside of Lamb that he needs to produce at a high level. Having said that I think he is pressing and taking too many unnecessary risks with the football.
As for the teams in need that would probably have gone after Dak, I would say the Raiders, Giants, Panthers, Browns, Dolphins, Patriots, Jets, Saints, Steelers, Seahawks, and Titans would all have varied levels of interest if he would have become available.