The best value at #3 is to draft Tua. We then either trade him or Stafford for a high return. There are several teams that likely will be interested in Tua and hoping he falls, notably Miami, Carolina, and the Chargers. The best way to leverage the asset is to take Tua and look to ship him. If the price isn’t right for Tua, we can absolutely get a decent return (I’d expect something like a 1st and a 3rd round pick) for Stafford - he’s a really good quarterback on a manageable contract (especially once some of these extensions come in), and there are a few teams on the border of contention that he could take over the top.
There is some risk in the approach in that we might not find suitors willing to pay a high price, but the potential upside here is incredibly high.
Too bad our front office is cowardly and overly conservative. This won’t happen because we won’t want to offend Stafford, and it doesn’t entirely fit with the “win now” mandate that the Ford’s handed down. A smart organization would take this approach - unfortunately we don’t fit that description.