Cyrus the Great
Cyrus the Great was born in Persia and his birth date is still unknown to this day. What he was famous for was that unlike other leaders, Cyrus was more tranquil to his enemies not burning them at stakes or killing their type. In Babylon, Cyrus was considered a hero to Judaism freeing all the Jewish people who were captive there. Cyrus also was very tolerant to the Babylonians and was a very laid back man. Cyrus died in 530 BCE.
Darius I
Darius was born in 550 BCE in Iran. During his reign, his most successful operation was invading the Indus valley and Babylon. Similar to Xerxes failed attempt in the future, Darius as well did not overcome the invasion of Sparta with his biggest lost at the battle of Marathon. Darius died in 486 BCE at the age of 64 and his son Xerxes then took power.
King Xerxes
Born in 519 BCE in Persia, modern day Iran. Failed his plan in Conquering Greece. (Sparta) His Spouse was Amestris. His Children Were Artaxerxes and Amytis. He was executed by Artabanus in 465 BCE at the age of 54.