Haha you're right! I was just reading Theros and probably confused Zeus with Heliod (who is exactly Zeus, but the sun).
Heliod is basically a representation of the blending of Zeus & Helios, which wasn't unusual in ancient times. Some sources called Helios the eye of Zeus. The hybrid God was seen by later Platonists as the highest Demiurge. Heliod is also partly inspired by Hera as God of Marriage.
The more traditional Zeus as storm God, would be Keranos God of Storms, Wind, and Ephanies, although Keranos has a touch of Muse and maybe Hermes to him as well.
They do this a lot, they combine Hephaestus, well his Roman Vulcan more destructive passionate side, with his wife Aphrodite's domain over passion and art, and part of Prometheus, and minus the disability to make Purphoros. His name actually comes from one of Prometheus' titles.
Thassa is obviously inspired by Poseidon but also Athena as Goddess of Knowledge.
Eberos is a Cross between Eberus, Hades, and Plutus. Maybe a little bit of Pan.
Nylea is mostly Artemis, minus the virginity thing, with a little bit of Athena's warrior side and Demeters domain over seasons.
Karametra is pretty much Demeter, with a little bit of Ares in the common to the settings Amazons.
Iroas is mostly a mix of Nike and Ares with some Centaur/Minotaur like traits thrown in.
Mogis was a mix of Ares' darker side and his sons, with the Minotaur thrown in.
Ephara is inspired by the Goddess Roma (Goddess and personification of Rome), with some elements of Athena, and some elements of Hephaestus.
Phenax is a mix of Hermes and Dionysus as God of rebirth, but corrupted.
Pharmika is a mix of Asclepius God of Medicine and Snakes and Akhlys Goddess of Poison, with some Boreas as God of winter and Chronos in that she was Goddess of old age.
Athreos is basically Charon mixed with the Grim Reaper.
Kruphix this God is hard to compare, but I'd say a mix of Nyx (the Goddess), Uranus, and a touch of Roman Janus.
Xenagos was a mix of Pan, Dionysus, and the Goddess Eris God of discord.
Klothys a mix of the Fates, Hecate, and Persphone, with a touch of Tartarus (Tartarus wasn't just the place where the Titans were Imprisoned, some folks don't realize that Tartarus was a God in their own right, with children