The DAZ figures all seem to have Alien morphs of one sort an another, and the TV/Hollywood style of actor-in-mask is almost too easy. Aiko is worth a look, as the base shape and proportions aren't quite human. It's not just whole-head morphs. Look at some of the ear morphs. It wouldn't be hard to morph ears to something odd, and then turn them into props for other figures, though you wouldn't be able to pass on the resulting meshes. And I'm not talking to Sarte...