This is Michael Kirkbride's (lore writer) list of most powerful beings in TES lore:

1. Talos
2. the Hoonding
3. Trinimac
4. Vivec
5. Leki
6. Reman
7. Auri-El
8. Wulfharth
9. Morihaus
10. Pelinal

What baffles me is why there aren't ANY Daedric Princes on his list? I always thought they were the most powerful beings.
I mean, come on, Vivec outranking Daedric Princes?