My favorite finished yuri is Lonely Monster and Blind Girl aka Beauty And The Beast Girl.
My favorite ongoing manga is The Fed Up Office Lady Wants to Serve the Villainess. It's my first villainess story, I really like it. It's an isekai, too, but it's really good. For a long time I thought all isekai was bad but now I see this isn't the case. I hope it gets an anime adaptation.