Mythical Creatures

I'm making a list of mythical/supernatural creatures that have or can take human form, from Europe particularly British Isles.

This isn't as easy as I thought. There's the obvious ones of werewolves & vampires. Various little folk & big folk who wouldn't pass as human due to their size. Some individuals.

Angels & their ilk
Demons
Various water spirits (each uisge, selkies, nixes, undine etc - there are a lot of these)
Dryads
Elves
Banshee
Aos si/daoine sidhe
Leansidhe
Golem

Now my brain is full up, but I'm sure there's more.