Usman dan Fodio was the leader of the Islamic Revolution
Prophet Muhammad (peace be upon him) is the historical leader and prophet of Islam per Quran revelation to him by God through the angel Gabriel (or Jibril).
Ayatollah Ruhollah Khomeini.
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Muhammad is said to be the founding leader and prophet of Islam
Prophet Muhammad (peace be upon him) is the original leader of Islam.
Islam is a religion not a spiritual leader. Islam is not dead.
Islam daily leader is called Imam who leads Muslims on praying for God.
The leader of Islam is prophet Muhammad (peace be upon him) and started in Mecca (or Makkah) in Saudi Arabia.
The original leader of Islam religion per Quran revelation by God is prophet Muhammad (peace be upon him)
Islam
The leader of Islam after prophet Muhammad (peace be upon him) is Abou Bakr Assedique (may God be pleased with him).
As far as I am aware Islam does not have a single spiritual leader, in the same way that Christianity has the Pope. Until the end of the Ottoman Empire (1918) the sultan of the Ottoman Empire was the de facto spiritual leader of Islam.
While there is no worldwide leader of Islam, most Muslim communities have an Imam who leads service and provides spiritual help.
Allah subhanallah wa ta'la is Rabb, meaning creator, master and our lord
The daily worship leader is called Imam.