Lets not make this too complicated fellas, there is really 2 options here that make any sense at all.
Option A...........we trade down from pick 4 and get multiple picks over the first 3 rounds of the draft.
Option B...........we got no trade partner or we decide to sit tight at 4. In this case, the top four players in the draft are Lynch, Goff, Tunsul, and Bosa. One of these guys is going to be there, so you just take the guy that falls to you.
Now barring a trade, we know that Tennessee is not taking a QB since they have Marriota, but they need protection for him so Tunsul makes the most sense. We also know that San Diego is not taking a QB since they just signed Rivers through 2019. So Cleveland is the only team that would logically take a QB or they could take Bosa.
So sitting at pick 4, we are either going to have one of the QBs on the board or we are going to have Bosa on the board. You field some calls, see if you can ransom the pick off, and then if nobody takes the bait or if we love the guy, we take him.