Yes, we have the soul shriven and mind shriven skins, but those are not actually undead. The Draugr and other skins attached to undead NPCs are also too dated, with poor textures.
I propose a fresh skin which takes inspiration from the Draugr skin along with a more skeletal face too it which you find on various liches, mummies and some other undead ayleids.
This picture is taken from one of the rendered undead in the second ESO cinematic, walking alongside the undead/worm thrall Covenant Hero/Nightblade.
It's exactly what I'd like to see, it'd work great with the zombie and skeletal mounts, along with various creepy personalities and a bunch of cool ingame sets. Please create something like this, team. And do it soon!
What would YOU like to see added as a future skin, a fully skeletal skin which allows you to wear your gear over a skeletal body, or just a skeletal head with whatever hat piece you've got on you?
Tell us, share!