Yes. Except they went from being two distinctly seperate creatures to just one.
I'm learning more towards association with Molag Bal. He/she is all about corruption and I think the undead would qualify as corruption of the flesh.
Sheogorath seems to have no problem with the undead too, as evident with all the shambles running around. Vaernima would also be a good candidate for being fond of undead, for they can be quite nightmarish. Everyone else either probably doesn't really like them or are indifferent. The daedra I'd say that loathes undead are Meridia, Namira (it ain't natural and is reflected on that with her ring in DF), and probably Peryite (likes to keep things in order)
As for your idea that undead are corruption of the flesh, I would disagree, since it's natural for things to rot. Instead, being undead would be a middle finger to Arkay, which Molag Bal did in the form of vampires and Mannimarco with his constant anti-Arkay propaganda. The dunmer see the "religious" undead to be holy, for they guard the many tombs and treasures of the dunmer (and in a bunch of cases, are more useful in death than in life).