Zeus
Zeus played a dominant role, presiding over the Greek Olympian pantheon. He fathered many of the heroes and was featured in many of their local cults. Though the Homeric "cloud collector" was the god of the sky and thunder like his Near-Eastern counterparts, he was also the supreme cultural artifact; in some senses, he was the embodiment of Greek religious beliefs and the archetypal Greek deity.
Henotheism
While Greek and Roman religion began as polytheism, during the Classical period, under the influence of philosophy, differing conceptions emerged. Often Zeus (or Jupiter) was considered the supreme, all-powerful and all-knowing, king and father of the Olympian gods. According to Maijastina Kahlos "monotheism was pervasive in the educated circles in Late Antiquity" and "all divinities were interpreted as aspects, particles or epithets of one supreme God". Maximus Tyrius (2nd century A.D.) stated: "In such a mighty contest, sedition and discord, you will see one according law and assertion in all the earth, that there is one god, the king and father of all things, and many gods, sons of god, ruling together with him."