Lastwall

(Note the above map shows Lastwall as the Gravelands, since it is using 2e lore. It will be incorrect-for-our-purposes in other ways as well.)

Lastwall pledged neutrality in the Chelish Civil War during its early years, when it didn’t look like the Asmodeans were among the possible outcomes, and still consider themselves bound by it (and too busy to do much besides, between Belkzen, their watch over Gallowspire, and the Worldwound). The Church of Iomedae, though, is implacably opposed to Asmodeus ruling a country, and Alexeara Cansellarion (who we genderswapped, but that was accidental and isn’t a necessary change) is assembling an army from his holdings in Nirmathas to do something about it.

Lastwall is legitimately a much more just and humanitarian government than has existed anywhere on Earth, arguably up to and including the modern day. It’s not notably wonderful along any other axes, it is only a typical amount of competent for a government. But its laws are few and consistently enforced, it doesn’t have special privileges for the nobility, its leadership are all ideologically committed Lawful Good people trying to meet their obligations to their people and the world, it does not engage in torture, it doesn’t commit war crimes, anyone accused of a crime has the opportunity to clear their name under truth spell, there’s notably little corruption, and its competitors are mostly doing medieval feudalism, by which point of comparison it looks astoundingly good. It is the only country in the world with a concept of illegal orders and mostly the only one paladins can work for without falling.