depends on who held the position, and what they did, all could be equal.

depends upon who you are asking. Italians might say caesar, while most of the rest of europe would say the king and the north africans of egypt might proclaim it to be a pharoah. You pick!

I'd say a King, because Royalty has stood the test of time, infact the world still has a Queen. Caesar was a small piece of history, with more negative attributes connected to his name. The Pharaohs built some of the most researched architecture till this day, but built there cities upon the bones of slaves in the name of gods that don't exist. They would be the 2nd runner up, with being the mecca of society in there time, but only the strong survive, the Pharaohs and Caesar have no blood line in power today.