Would the anology work better if the Aedra = titans? It seems like the titans have closer ties to the primordial origin/creation of the Earth than the Olympians do, the defining feature of the Aedra.
The titans are also imprisoned in some fashion, IIRC, much like the Aedra are in Mundus.
I think that trying to link it to any one mythology, especially Greek mythology which has been so sanitised and simplified over time, is really an excesize in futility. But if you had to go with greek, the titans were also into incist and [censored]. Like the Daedra, they represented primordial, primarily external forces while the gods were a mix of external and internal forces (thunder, lust), like the Aedra who are justice, time, etc.