The most famous ruler of the Ghaznavid Empire was Mahmud.
The Ghaznavid Empire existed for two centuries and therefore had a great number of leaders. Probably the most famous and important of them was Mahmud of Ghazni, who expanded the borders of the Ghaznavid Empire to their greatest extent.
Mahmud of ghazni was the most influtential ruler of the ghaznavid dynasty
Sunni Ali, who became ruler of the Songhai in 1464, worked to unify, strengthen, and enlarge his empire.
The most famous ruler of Eygpt was King Khufu.
Mansa Munsa was the most famous ruler or emporer of Timbuktu.
The most famous ruler of mongols was Genghis khan.
Ottoman Empire was based in Istanbul, Turkey (for the second half of its existence). The first ruler of Ottoman Empire was Osman I. The most famous rulers of this empire were Mehmet II the Conqueror (el-Fatih) and Sultan Suleiman I the Magnificent (al-Qanuni). The final ruler was Abdülmecid II.
The most well-known ruler of the Aztec Empire was Motecuzoma II, who is the king that Herman Cortes negotiated with when he landed in the New World in the year 1519.
The most famous dictator of the Roman Empire
"Il Principe" ('the Ruler') was Machiavelli's most famous work.
The famous ruler of Songhai was Askia Muhammad I, who ruled from 1493 to 1528 and is known for expanding the Songhai Empire through military conquests and promoting Islam throughout the region. He is credited with making Songhai one of the largest empires in West Africa's history.
Aristotle's most famous student was Alexander the Great, who later became a prominent ruler in ancient Greece. Alexander had a great impact on history and is known for spreading Greek culture throughout his empire.