The only multiversal+ stuff I can recall from Saint Seiya is Chronos (not to be confused with Kronus/Kronos), but I don't believe anyone scales to him (it?).
Original series Hades is low multiversal, there's interpetations of statements in Assassin which would extend that much higher, but no one really wants to argue on it until the series is done I'm presuming (or at all because of the translation issues)