The most important Greek gods and goddesses.

Zeus: The Olympian god of sky and thunder. He is the son of Cronus and Rhea. Many mythologists believe that Zeus is one of the oldest Greek gods.

Poseidon: The god of the sea. He was feared, because he provoked earthquakes and worshipped as the inventor of the horse.

Aphrodite: The Olympian goddess of love, beauty, sexual pleasure and fertility. She had affairs with all of the Olympians except Hades and Zeus.

Hermes: The winged herald and messenger od the Olympian gods. He was the only Olympian that could cross the border between the living and the dead.

Hades: He was the god of the underworld. He was also called the god of wealth or "the rich one" because he possessed the precious metals of the Earth.

Hera: She is the queen of the gods. She is known for being the goddess of marriage and birth. She was the wife and sister of Zeus.

Apollo: He was the Olymoian god of the Sun and light, music and poetry, archery, agriculture, and many other things.

Athena: She is the Greek virgin goddess of wisdom, civilization, mathematics, strategic, crafts, etc.

Ares: The god of war. He is the son of Zeus and Hera. He was well known as the lover of Aphrodite. When he appears in myths he is typically facing humilliation.

These are some of the gods and goddesses that we find the most important in Greek mythology, others might have a different opinion. All of the gods and goddesses we included are Olympians.

References:
Anonymous author. "Greek Gods" Greek Gods & Goddesses. https://greekgodsandgoddesses.net/gods/ (consultation date: 09/12/19).