AurumCalendula

While the latter isn't a GL series per se, the main character does have a female love interest and doesn't get together with the male love interest at the end.

I'm so excited for more historical GL settings! Have you seen the movie The Handmaiden or the drama Painter of the Wind?

There's a compilation officially(?) available here (with MTL English subtitles): https://youtu.be/WYKDQVIZkYY

Thank you so much for making this list! (Have you seen the 2020 drama The Message (风声)? imho it has a lot of GL subtext between the leads.)