Just to make sure, you're also aware of Owlcat's Pathfinder: Wrath of the Righteous, right? It's not out now (currently in alpha available only to kickstarter backers I think...), but it should be out in a year's time or so (idk).
From what I've seen others post, it's pretty good so far.
I'm in the alpha test for WotR and yes it is going to be very good. Also loving Solasta which is also still in development but very good already. Anyone who has not played Kingmaker, stop what you are doing right now and go get it, you will not be sorry. BG3 looks the best visually with the big budget motion capture and I'm sure the story will be fun and worth playing but I don't see it having the replay appeal of Kingmaker. Also have to mention that Kingmaker has a DLC that is pure dungeon crawl and it is so much fun because you create a full custom party for each run and there are so many great classes to choose from, you are always thinking about what party you want to build for your next run.