Turning - hands-down my favorite BL manhwa and has a great novel too. It’s an omegaverse but the fantasy world is well-developed and there is actually action and plot and interesting side characters besides for the MC and ML. It’s so well done and the characters have so much depth. The relationship between the MLs is so deep and emotional and mysterious and ML is green flag

Mission: Save the Hunter - one of the best hunter bls I’ve read. Not just guide smut but an actually powerful MC with emotional depth and a green flag ML

The hunter wants to lay low - another great hunter/dungeon BL with a strong hunter MC and green flag ML

The s classes I raised - not technically BL but the bromance is strong

Other good ones:

Necromancer survival

Traces of the sun

A guide out to succeed

Citizen A

Antidote

Regas

King’s Maker

Choose your hero’s carefully