I think Josh Donaldson makes a lot of sense for the Rangers on a 2-3 year deal....with a high AAV but limit the years.
Third base is an area of need and Donaldson is still top 10 at the position.
(Moustakas would be another to look at.)
I like Anthony Rendon but he's gonna want a much bigger contract at this point than Donaldson.
I think there's some risk of buying high with Rendon, given the regular/postseason he just had (career high WAR on Fangraphs, 2nd highest according to Baseball Reference.)
A short term deal for Donaldson immediately improves the team but doesn't hand-string them long-term if Josh Jung, their 1st round draft pick in June, develops as expected and is ready to take over the position sooner than later.
Donaldson does come with some injury concerns, but he stayed healthy this season playing in 155 games.