There really isn't an impact player that is available in the trade market. The best is probably Byron Buxton and he probably isn't available. The next best option is Wilson Contreras. Offensively this trade market is well below average for impact bats. For the Brewers it is even worse as there is no 3B to replace Ortiz. In the OF you have Buxton but can he stay healthy and will he waive his no trade?
Pitching wise there is enough out there but no one who is an impact pitcher, I don't believe Skubal will be traded as Detroit is close to a playoff spot. The next best options are Gray and Alcantara. Then relief pitchers it is Chapman and then?