It depends on how you read the question:
1) Who are some leaders who ruled over anarchies?
The whole point of an anarchy is that there is no political establishment. As a result, there is no mechanism to appoint the leaders in a system where there are no leaders.
2) Who were some leaders of the anarchist movement?
Pierre-Joseph Proudhon, Henry David Thoreau, William Godwin, Josiah Warren, and Mikhail Bakunin were some noted philosophers and activists in the Anarchist movement.
By the very definition of anarchy there is no leader.
Anarchy is a complete lack of any form of government. There is no leader.
Root = an- meaning without. Ex. Anarchy = Without leader/government.
Anarchy
Anarchy.
Anarchy
Anarchy, from the Greek root arkhos (ruler).
Anarchy has has no government. Anarchists don't think we need a "leader". They think that humans have got an own brain they can use when they meet other people, instead of having a government/leader who tells you how you must act.
They choose a leader and get jobs.
Solon
The root of the word "anarchy" comes from the Greek word "anarkhos," where "an" means without and "arkhos" means ruler. Together, it conveys the concept of absence of a governing authority or leader.
Absence of government; the state of society where there is no law or supreme power; a state of lawlessness; political confusion., Hence, confusion or disorder, in general.