If the Vikings surprisingly do pay Darnold what he's worth (probably 40 mil annually at least), the Browns should shift their focus to J.J. McCarthy. Easily clears the top QBs in this Draft. I would imagine we're starting with our 1st and probably a 2nd, since there will be a bidding war. Probably won't get far beyond that, unless another team goes crazy and offers multiple 1sts.
As far as teams in the running, I imagine the Raiders and Giants are out as they will likely be in position to draft Sanders and Ward for the full value of the rookie contract. That leaves the Titans, Browns, Saints, Rams, Steelers. My bet would be on the Rams as they've shown no hesistancy in parting with picks for talent, but I think we're a clear 2nd given how desperately we need a good QB on a rookie contract to get us through the finals years of the Watson contract.