In Sri Lankan mythology, Zeus, the king of the Greek gods, is often equated with Indra, the king of the gods in Hindu and Buddhist traditions. Indra is a prominent deity in Sri Lankan culture, revered for his role in controlling weather phenomena and being the leader of the devas (celestial beings). Therefore, Zeus can be considered equivalent to Indra in the context of Sri Lankan mythology.
Demeter gets my vote. De-meter. The mother. She is goddess of earth's fertility, distinct from Athena, goddess of "wisdom" as practiced by warrior Athenians. (Athena's also goddess of war, as is evident from the helmet she wears, and her spear). Athena is no sweetie pie. She's a virgin (anti-fertility?) obedient to her father-mother Zeus, from whose "mind" she was born, via another godly act of parthenogenesis. Demeter is a much more "measured" goddess, as are the seasons she is linked to "naturally."
Apollo also does not get my vote, despite his priestly philosophical posturing. He's a killer of the feminine in nature (Python, symbol of primitive female), and one thing he doesn't really want to discuss (or perhaps know about himself) is his 19 episodes with lover boys. Yes, boys. Not men.
Poseidon may be the most interesting one, since he does not fit perfectly into the list of Greek gods. Poseidon is somewhat odd, and foreign. It may be that his perception got dominated by foreign gods, equated with Poseidon via interpretatio graeca. This makes you think.
More anciently the sea was often female. From this we get "mater," the mother, and its derivatives in Latin, "madre," "mare," and, also, "Mary." The sea is the stuff of life, its originator, its "mother." (As was De-meter, the mother-goddess of fertility.) The words "matter," and "matrimony" derive from this linguistic source. In a sea-faring and violently patriarchal society such as that of the ancient Greeks, the sea is therefore made masculine, a symbol more of power than creativity. Poseidon is often imaged as driving horses, presumably some "mares" too. And Zeus becomes a "mother"-"meter" too, giving birth to Athena via "parthenogenesis." Athena slips out from his brain (he has no womb). We now adore the Greeks for their Parthenon, for their violent "heroes," and for gods whose reputations have been whitewashed and turned "classical." Including Athena, who is virgin author o;f "wisdom" (a la Zeus), but is imaged as wearing helmet and armor. She's not a nice girl. Political right-wingers are trying to resurrect her and most of her companion gods.