I ship her with Jeffrey too, it's clear the guy has feelings for her and considering they're both over 100 years old, it's likely that he's been in love with her for decades, if not a whole century. I mean really if she doesn't want to go out with a 19 year old, the 20's and 30's won't make much difference.
So the only candidates are supermen (like her, who don't age), elves, or other magical beings.
Still, I'd rather she pair up with Jeffrey rather than some super powerful wizard, elf, or demon (conjecture) that comes out of nowhere.