It's a risky bet, but... FTM transition then MTF voice therapy? MIGHT work.
Also, I've "been on T" for a while, but (until recently, actually, but my vocal chords probably have an issue apart from T; looking forward to seeing the doctor) I am/was able to sing female songs fairly well, even though when I relax and lower my voice enough to hate it, I definitely sound male, which shows that I'm not just a lucky one without a male voice.