The Olympian Pantheon:
Zeus
Hera
Poseidon
Hephaestus
Ares
Apollo
Artemis
Athena
Hestia (Dionysus)
Aphrodite
Demeter
Hermes
Zeus Hera Aphrodite Athena Apollo Artemis Demeter Dionysus Poseidon hades Hephaestus ares
Hercules
Many characters in Greek mythology could be described as strong because a lot of them were warriors, but the most famous strong mythological hero is Heracles/Hercules.
Medusa
The most famous Cyclops of Greek mythology is Polyphemus.
Greek is not the longest lasting mythology there are older civilization with older myths. Greek however is the most "famous" (i guess that would be the most appropriate word). it is the most studied
As often as you hear her name in Greek mythology, she WAS NOT the most popular goddess, it was Hera. Athena was ONE of the famous goddess, but not the MOST popular. Out of all the Greek gods and goddesses, Zeus was the most famous.
The most famous ancient Greek oracle was that of "Delphi".
There are many Greek monsters in mythology; the favorites and most famous very over from ancient to modern time.
Greek mythology is compiled by the thoughts of many writers; some of the most famous authors are Sophocles, Euripedes, Ovid, Homer, and Virgil.
The god of prophets is Apollo (same name in Roman mythology). The most famous prophet, or oracle, is the on at Delphi.
Well, a lot of companies are based on Greek Mythological characters: the most famous company being Nike, which was named after the Greek god of victory. I suppose some people believe in it too, which can affect their lives tremendously.
In ancient times an oracle was actually the special place in a temple where a Mantis (Μάντης : a prophet) gave the prophecies. The most famous Mantis in Greek mythology was Tiresias and lived in Thebes (in Greece not Egypt).
The Minotaur is most well-known for the man-eating version that lurked in the Labyrinth.