I would emphasize that I'm not an expert, that research is advised, that my definitions are simply off of what I personally have found and extrapolated, but to give feedback on what they are and why.
A not-so-short list? Sexuality: Asexual, demisexual, pansexual, bisexual, homosexual, queer, a little quip about heterosexual. Romantic: Aromantic, demiromantic, panromantic, biromantic, homoromantic, queer, and a quip about heteromantic. Gender: transgender, gender non-conforming, genderqueer, genderfluid, bigender, agender, third gender, other gender, two-spirit, and a quip about cisgendered. And, while not an orientation, I'd also include polyamory, since it's on a similar topic, mostly covering the "not conforming to the mold" of love as traditionally defined (that being, "one man and one woman love and have sex with each other").
Of course, I would need to put in a ton of disclaimers everywhere, including how if I don't cover something, it's not because I think it unimportant: it's because I literally don't know, so people commenting should feel free to enlighten me.
Love the idea. If I have the time for it, I think I can actually do it, too.