2. 3B/1B Justin Turner
Justin Turner can still hit. The Brewers have tried for him in the past and now that he's a free agent again, perhaps they'll be able to get across the finish line this time.
Turner put up an .800 OPS in his age-38 season with the Red Sox. He slashed .276/.345/.455 with 23 homers and 96 RBIs. Defensively he may not be an everyday third baseman anymore, but he can still dabble over there while spending time at first base and DH as well. It just so happens that all three of those spots are positions of need in the Brewers lineup right now.
Turner has been a league-average or better hitter every single season for the past decade. He's shown no signs of decline with the bat and given his age, Turner is looking at short-term contracts, which is exactly the kind of free agent deals the Brewers usually sign. They don't splurge on contracts longer than two years on the open market very often.
The Brewers could use an experienced hitter and leader like Turner. A right handed corner bat with pop is something Milwaukee's lineup is currently lacking. His price tag should be fairly reasonable and the length of it will line up with the Brewers contending in the near future while also allowing time for the corner infield prospects they have to develop and take over right after.