I think Dragon Husband is a good example of things that work on a LGBTQ romance.
The 4 MC are in a polyamorous relationship and are bi/gay. The plot is long and they slowly get to know each other (except maybe for Kick, who has a more "let's do it" attitude at first, but then that's okay, 'cuz some people are like that so it's believable and he too has some character growth in other aspects; he's not simply a shallow person who is there for the fan service).
Heavy horns is great too and the MC have a healthy relationship at the end of the day.
Autophobia is another great one.
And a few others that develop well IMO:
Tapas is a better place to find BL/GL sometimes, since the creators themselves are more diverse than with manga.