Zeus is the king of all the gods. He comes to power because his mother saves him from being devoured by his father. Zeus then comes back and saves his siblings and overthrows Chronos. Zeus becomes the new king. However, his power is not safe. There are many threats to Zeus’ rule. They include the Titans, the Giants, Typhoeus, other gods, and Hera. The threat from Hera is the threat that is mentioned in the Hymn to Apollo and in the Iliad 14-15. She is a very powerful figure in his life, and, as we see in the Iliad, is very deceptive. In the Iliad, she goes to
Aphrodite and lies to her, Aphrodite then gives Hera an enchanted breast band that has the power to seduce almost anything. She puts it on and then goes to Zeus and makes love to him. Afterwards, he passes out and the Trojans start to lose the war. Similarly, in the Hymn to Apollo, Hera again threatens to have a son that is stronger than Zeus. The implication here is that he will eventually overthrow Zeus just like Zeus did to Chronos. These threats from Hera are much more deceptive and intellectual than the other threats to Zeus’ power. Many of the other threats consist of a physical danger to Zeus.
The Giants, who are extremely big and strong, could unite and eventually kill Zeus if no one helped him. There are a bunch of the Titans that could, again, physically take care of Zeus. Then there are Zeus’ children and siblings that could stage a revolt against Zeus and take Olympia. As I said, the latter threats are directly physical, whereas the Threats from Hera are indirect, and often require some cunning and skill to execute. Overall, I believe Hera to be the greatest threat to Zeus because of her seductive power and her genius ways.