Any complete factions?

Are there any factions that you think will never get any more new content? Not whether or not you hope they will but rather what you expect. I have this little obsession with wanting to get the "complete" experience with a faction where I can play it for a very long campaign and then check it off and say "done, I have now gotten all that I can out of this faction and will never have to play it again". But obviously that plan falls apart if they then get a new lord or a substantial faction update.

So what do you think? Are there any "finished" factions to play?