Might as well do the recents:
2017, Houston: 'Stros chances all depend on how harsh history looks on their sign stealing. Beltran got 57% in the voting last year and has plenty of ballots to make it; Altuve looks to be pretty lock-y. Carlos Correa has a shot, maybe even Alex Bregman.
2018, Boston: Mookie Betts obviously; Chris Sale’s extended injury woes likely have ruined his chances. Rafael Devers will need to pick up the pace and have some MVP level seasons given his poor defense, but he keeps getting injured in the 2nd half of the season. Kimbrel’s career is apparently over.
2019, Washington: Max Scherzer for sure; Juan Soto is certainly young enough to accumulate a TON of value; Trea Turner doesn’t really have much of a peak.
2020, Dodgers: Mookie, again; Clayton Kershaw is likewise a lock; Cody Bellinger had HoF talent, but pretty much only for one season; likewise with Corey Seager, who has 37 WAR thru age 30, but none of his top 10 comps thru that age are in; Kenley Jansen, see Kimbrel and Chapman.
2021: Atlanta: Ronald Acuña Jr. if he can keep from getting injured going forward; Freddie Freeman just cleared 60 WAR this year, has an MVP, and is only 34.
2022, Philly: Bryce Harper–again, gotta avoid the injuries–his peak is not historically great, note, MVP or not.
2023: Texas: Corey Seager also got a ring here. I would normally say that they won recently enough that any of their young stars could pick it up a notch, but they only had 2 key players younger than 27.