Ngl I don't read A LOT of GLs but from the ones that I have read:
No particular order:
Gunjou
https://www.mangago.me/read-manga/gunjou/
Sabishisugite Lesbian Fuzoku Ni Ikimashita Report
https://www.mangago.me/read-manga/sabishisugite_lesbian_fuzoku_ni_ikimashita_report/
Blue (it has a movie!!!)
https://www.mangago.me/read-manga/blue/
I love Am......
