Pathfinder Kingmaker made it mostly right. You have some characters that are straight (Valerie, Tristian), some bisexual (Octavia and Regongar). I think there was no one straight homosexual, but maybe I don't remember, since I didn't actively look for it.
The only things I didn't like were:
(1) I couldn't romance Amiri with either sex, because she is some kind of original character (2) It was far too easy to break up Regongar and Octavia. They basically immediately dump each other for the player.
I actually liked the Regongar Octavia relationship, it was based on mutual trauma, which when taken away revealed more about their individual characters, so influencing them to stay together or splitting them apart made sense to me.
As for Amiri I would maybe clarify that her not being romanceable is fine, but you not even being able to attempt to romance her is a shortcoming.
Talking about the split between availability of relationships based on sexual orientation is one thing, but less common than all of that is characters who will reject your advances in general.
