Here's what I found during my tour of EK last night:
Restless Shadelings -- Deadwind Pass -- they're in the caverns under the village outside Karazhan, and they do indeed use the wraith model
They might be time-dependent, as it was late at night when I was over there.
Fledgeling Vultures -- Redridge Mountains -- north of Lakeshire, they are, as expected, tiny vultures
Undead Eagles -- Western Plaguelands -- in Andorhal, but you can only see them if you're in the correct phase. My hunter hasn't done that quest chain, and the eagles disappeared the moment I tried to fly in to see one.