I've drawn a huldra a few times, and searching for huldra will undoubtedly only give to female hits, but they also have male equivalents, the huldrekarl (Literally "huldra guy").
They're not as popular anymore as the female half of the huldra population, but that doesn't mean there aren't plenty of old stories about them. They're not as shy about the holes in their backs, and unlike the females who usually target lone people in the forest, the males are sometimes smartass enough to ride into towns on a horse and lure their target into the wilderness.
Next to the huldrekarl is of course the good old nix. I'm sure there's some story in here about him losing his violin and trying to talk a pretty-but-slow huldrekarl into getting him a new one.