I thought about it for a moment, I think Amagakure Gido might be one of my favorite yuri authors of all time, I feel like just about everything she's put out has been really really good. Admittedly, that's just the anthology I'll Send Her Home on the Last Train and a single oneshot, but every story from the anthology just hit perfectly right.
I also feel similarly about Usui Shio, where the body of work isn't as prolific as some authors, but every single one of the works seems to be pretty good, but not quite as memorable as those off I'll Send Her Home on the Last Train. Crescent Moon and Donuts though is fucking spectacular so far and looks to be only getting better. That's the two I'd shout out right now, for being incredibly consistent and SFW.