I found the first Pillars of Eternity game incredibly boring, and actually liked the 2nd one more... though I also grew bored of it before too long. BG2 was ok, but I don't think any of these games can hold a candle to PS:T in terms of writing.

I haven't tried Pathfinder: Kingmaker, because it has an enormous number of very negative reviews, so I'm surprised you'd put it in the same league as PS:T.