Max (Sam & Max Save The World) - he/him - Gay "I'm not going back in that closet. Not after all we've accomplished."
Sam and Max are Married. In the games you play as Sam.
Yes, this counts.
Though the openness of their marriage is up for debate

seen from United Kingdom

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Max (Sam & Max Save The World) - he/him - Gay "I'm not going back in that closet. Not after all we've accomplished."
Sam and Max are Married. In the games you play as Sam.
Yes, this counts.
Though the openness of their marriage is up for debate
Megaera (Hades) - she/her - Pansexual & Polyamorus
""Shut up already, Zagreus. And come here.""
One of the three Furies, responsible for punishing adulterers, oathbreakers, and thieves. Tasked with stopping Zagreus from escaping, she initially seems impossible to romance, but after reaching max affinity by gifting her 'contraband' (and completing a favor for her) Zagreus can persue a relationship with her.. once again.
Paladin Danse (Fallout 4) - he/him - Bisexual "Would it be possible to speak… off the record for a moment?"
Danse is a strong, level-headed, judgemental and loyal Brotherhood of Steel soldier. He has little sympathy for those outside his organization's harsh binary worldview of good and evil. Danse deeply cares about humanity, yet is often frustrated by shortsighted wastefulness or violence.
Boss Finn (Potionomics) - he/him - Straight "Heh. And I’m too irresistible, is that it?"
Big Shark Guy. Mafia boss type. Underhanded and Overconfident (with good reason) While Initially hostile with Sylvia, he asks her to be his mentor. Over time he shows a genuine willingness to learn from his mentor and grows fond of her. Once they start dating he begins using his knowledge and skill set to protect Sylvia from any harm that may come to her.
Spoilers for In Stars And Time
Isabeau (In Stars And Time) - he/him - Queer "Oh, you pay that much attention to me…?"
He is an ex-defender from Vaugarde, he quit to help mirabelle on her world-saving quest. He is transgender, transitioning a number of years before the game begins. Coming off as loud, he's very kind and thoughtful, yet he acts like a bit of an airhead even though he's very intelligent. He's a lover of puns, especially Siffrins' puns (the player character) who he obviously has a crush on, as such is very attentive to Siffrins' mannerisms and their feelings, even if Siffrin doesn't notice.
Zoe (Monster Prom: Second Term) - she/her - Bisexual & Transgender "They were a kid, she was a girl, I am a sentient Octopus!"
Zoe lived for many eons believing that she was destined to bring about the destruction of the world, being an eldritch entity and all that. Yet, zoe harbors a sense of isolation, as when she revealed herself from the totem she said she had never received a compliment in her existence. She initially appears a a horrendous mass of "flesh" but given time, appears to abandon her destiny and instead take the form of a high school girl. She is incredibly curious, often asking various questions to everyone around her.
Piper Wright (Fallout 4) - she/her - Bisexual "Okay, I guess we're going have to go with the satirical approach to this article…"
Piper is a resident of diamond city and the sole journalist of Publick Occurrences. She has a strong drive to better the world and refuses to be complacent. This drive often lands her up in trouble but she has a charisma that can get her out of any situation.
Astarion Ancunín (Baldur's Gate 3) - he/him - Pansexual "Well, that’d certainly spice up this evening.”
He's the group's rogue, and shhh! he's a vampire!? Which makes him attractive to 90% of this platform. As he can be romanced by any gender, he is functionally pansexual. His charisma and wit lead to a very flirty romance story line with varied outcomes based on player choices.
Edit: He has been confirmed to be canonically Pan by his VA and the main writer.