I apologize in advance
Look, I apologize in advance if this for whatever reason makes people mad. Maybe it belongs on a different subreddit or something, but I had to tell someone who's played the series.
I headcanon that Garth is asexual. Obviously Reaver's probably bi, but that got be thinking about the other heroes. Sparrow is whatever you want them to be, Reaver is Bi, Hammer probably straight but uninterested at the moment, and Garth is asexual. This is not something that matters to the gaming or Fable experience, but it's something I thought about. Why do I think Garth is asexual? I don't know, I just feel like he is. I could be wrong, but this is my headcanon.
Reaver does canonically swing both or all ways, when he's rambling near the end of the game in the secret passage he says something about having been caught cheating on a woman with a man. So bi or pan.