There aren't that many Lalafell enemies period.

I'm pretty sure that there's a quest where you fight reanimated Elezen in Mor Dhona. Not to mention that the main bosses and enemies in Haukke Manor are supposed to be Elezen as well. Other than that, there aren't THAT many areas that are populated with the undead (not counting skeletons since there's no telling what race that skeleton belonged to), and they probably wouldn't look all that special since they'd probably just make their skin grey/pale and turn their eyes white.