I would avoid LeMahieu, since there is no way to tie him to an improved pitching staff. Not like anyone playing 2B for Boston is great trade bait.
I would avoid Turner, while it does create a logjam with Devers and Dalbec, I think the Sox are better off with their current corner infielders.
Brantley is an interesting thought. Excellent hitter who frees up Benintendi. My only concern is how much field he will be able to play over the next 3 seasons, since the Sox are likely to have DH filled for 2 of them.
Forget Yates, Minor, Greene. Hendriks and Schoop have promise in my eyes. The reliever market is one the Sox relly need to look in to, but the bet option is a tough call.
Springer and Ozuna figure to be among the most expensive, and the money is probably better spent on Bauer or Realmuto. Tanaka is a Yankee, so pass. Stroman is a possibility, as is Robbie Ray...