Baelnorns..
Call them elves, or call them liches, either way the coin lands..
They gain some of the perks of being a lich, with some different drawbacks (servitude of some form is typically involved in this, or at least, it can be depending on how the coin lands). Their immortality is already inherently divine (in most cases anyway), and only seldom do they need phylacteries to harbor their spirits (so far as physical threat goes, most baels are able to clone/copy themselves, or recreate their own vessels at-will at a location of their choosing).
Add to that the years of lifespan they have as elves, even before they become baelnorns, they can accumulate decades beyond what a human or other would-be species prior to a transformation... The whole, retaining memories, personality, etc etc, just seems to be a too-good-to-be-true type deal. Though as it turns out, it is true..
There are a few drawbacks however.. The matter of transformation is no easy feat, you'd have to be really trusted by the DM to be a successful Bael (or such is my experience), plus the whole "connection to goodness" thing, sometimes it's too flowery and rainbows to be taken seriously. If you can get over that hill though, then why not turn your back on your society and use your immortality to raise demons, or undead to further serve your own agendas.
Once upon a time, I had a lot of fun playing a Baelnorn, his existence predated several centuries of gametime, as well as a handful of the current cast of realm-gods in power (though he was no god himself, he was something more akin to a primordial). I ended up recycling his concept into an unholy figure, in another campaign down the line, after he used his immortality to exploit several contracts with demons, and usurp quite a bit of evil power.