I have managed to win EFS Enhanced several times as each of the houses (except as Decados, gross) yet I have not earned the Baronett achievement. Every time I have won it has been by proclaiming myself emperor and winning the subsequent elections, so I am not sure what I am doing wrong. I tried looking in the forum but didn't see any other topics about this.

Has anyone else earned the Baronett achievement? If so, how did you do it? Or is the game bugged at present?

I was, yes. I always launch EFSE from GOG Galaxy. I have unlocked many of the other achievements for this great game, but for some reason this one seems to not trigger.