The Editor: About a young idealistic man who's gotten into politics, which puts him in tension with the family of his fiancée, who are scared of scandal, and the eponymous editor threatens to publish scurrilous articles about them. Not a great play, due to many flaws. It's melodramatic, didactic, and the edtior is very conscious that he's evil and has a half-assed redemption at the end. But it’s not that bad either, the interesting characters elevate it somehow. The father is a very well written character, who realistically justifies his own cowardice to himself, Gertrude (the fiancée) is a great character too, and the play overall gripping and entertaining.
The Bankrupt: A play about a businessman who goes bankrupt and how this affects his family life. I think this play is generally considered his best work, but for me the long dialogues about the nature of money were boring, and the characters and family dynamics weren't anything special either. It was a boring and mediocre play and I like "The Editor" much more.
The King: this was his best play in my opinion, although I personally wouldn't call it a masterpiece or great either. It's about a king who wants to be a reformist and is in love with the daughter of an imprisoned republican. Most of the play is spent in political debates and characters have a little room to breathe, but it's still a compelling drama which treats its political subject matter with nuance.