Best map generating tool for generating, ideally, a single Empire with internal territories IE the Holy Roman Empire?

Like, I've searched in here for a while to find resources, and while many are great, I keep running into the same issue often.

A lot of them are made for designing worlds. And that's great, and fun, and all of that good stuff, but I'm not going to write about a whole world, I'd really rather just flesh out a single, pretty large nation, and maybe the border regions of whatever other nations the thing is next to.

So, any great resources with a more limeted scope, ideally with noble territories inside an empire also generated?