Some African kings are also quite interesting from a world-building/story perspective.
Shaka Zulu seemed like a brutal but effective conqueror of neighboring Africans. After him other Zulu kings waged war with Europeans as well, like in the Battle of Blood River, where 400 Boers managed to fight back over 10 000 Zulu attackers; or the Battle of Isandlwana, where 2000 invading British soldiers with modern weapons were completely overrun by 20 000 Zulus.
Mansa Musa of the Mali Empire made himself known as the richest man in history during his trip to Cairo and Mecca. He also founded the University of Sankoré, which apparently was a world-class facility during the Middle Ages, with over 300 000 manuscripts surviving to this day.
The mythological Queen of Sheba may or may not have been African, with apparently both Ethiopians and Nigerians(!) laying claim to her.
There are also interesting historical cities. It's a pity so little is known about the
Great Zimbabwe ruins or
Benin City, which apparently impressed Portuguese visitors with its neatness and vast moat system.