Who was the prophet that taught about the cosmic struggle between the good god Ahura Mazda and the evil god Ahriman?

The prophet who taught about the cosmic struggle between the good god Ahura Mazda and the evil god Ahriman is Zoroaster. Zoroaster, also known as Zarathustra, is the founder of Zoroastrianism, one of the world's oldest monotheistic religions. His teachings emphasize the duality of good and evil, presenting Ahura Mazda as the supreme god representing goodness, truth, and light, while Ahriman symbolizes chaos, deceit, and darkness. This theological framework introduces a moral dichotomy that plays a significant role in Zoroastrian thought and has influenced various other religious systems throughout history.

In contrast, the other figures listed—Moses, Mohammed, and Paul—represent leaders and prophets of different religious traditions (Judaism, Islam, and Christianity respectively) and do not focus on the specific cosmic dualism of Ahura Mazda and Ahriman as central to their teachings.