I guess it depends on how much you view the Angels as alternate visions of humanity, but even so.

We don't have much to go on to understand who/what they are beyond Kaworu and Arael's mind rape apparently being him groping at Asuka's mind to try and learn/understand humans.

I think they are less alternative and closer to something like Yokai. Creatures that exist in the same realm as us, but their motives and minds are unknownable to us beyond "its good/bad" and "how to avoid/stop it." But unlike most Yokai they aren't going to just kill one person, but the entire world.

Though I'm really reaching the end of my memory on specific details at this point, so I might be off on something parts beyond my vague recollection and memory of reactions. Its been a few years and a lot of other anime in the meantime.