Why not use juhani's build as a starting point for the falleen one? If you looked at Savan (Xizor's niece) she had some similarity, though there were differences it is true: but you'd have the top knot, and the eyes as well, would just be a matter of the clothing too, course could always use a cathar as well if you wanted to add more diversity, or an ubese as well, they do have the models for that as well.
https://vignette.wikia.nocookie.net/starwars/images/1/11/Savan_-_SWGTCG.jpg/revision/latest?cb=20131008210435