Here's my opinion(s): 1) Gallo would bring back nothing of value. The choice is whether to keep him on the team or DFA him. I say DFA. 2) Kepler has value, but he is probably worth more to the Twins than any other team, so he stays. The big question that will probably be determined by August and September production, is whether the Twins will pick up his option for 2024. 3) Wallner is less than a year younger than Larnach and has only 127 plate appearances in the majors, but he shows more upside (particularly power) than Larnach. 4) Larnach has nearly 700 major league plate appearances and has failed to establish himself as a major league regular. He's shown enough to interest other teams, particularly rebuilding teams, and is the logical choice to be traded for someone who can help the club this year.
If I'm the Twins FO, I would DFA Gallo (swing and a miss on that signing), trade Larnach for the best relief pitcher or RH hitting outfielder they can find and put Byron Buxton on the IL.