they acted as mediators, layers,judges, even executioners.
They were known as Prophets.
Confucius was the only leader
The earthly leadership for Christianity is primarily represented by the Pope for Catholics and by various denominational leaders, such as bishops, pastors, and elders, for other Christian denominations. These leaders provide spiritual guidance, oversee religious practices, and help in the administration of churches and religious communities.
there were many prophets and the main leader is muhammed (s.a.w)
All of the prophets of the Hebrew Bible are considered leaders, as well as many Rabbis and political authorities of the last 2000 years.
The Rabbis and sages. See also:Important Jewish leaders, prophets and rabbis
Hazrat Abraham (AS) and his off-spring who were Prophets.
Moses, Aaron, King David, Maimonides
The question is not clear at all. How many prophets, books, miracles, leaders are you asking about.
The concept of a rabbi didn't start to appear until the end of the Biblical period. Prior to that, the prophets, kings, and Temple priests were the leaders.
Hebrews (called Jews today) have had thousands of leaders in the past 4000 years. There have been many prophets, kings, sages, rabbis, and scholars. You would have to be more specific about a timeframe.