Who is the greatest African Empire?

It goes like this. The greatest has to be Ethiopia. I'm not even Ethiopian and I'll acknowledge that. Despite current problems, no African state or empire has gone through as much, been around as long and had as much influence on the continent or on the world stage. Mali Empire is a close second. 1. Ethiopia 2. Mali Empire 3. ancient Egypt 4. Aksumite Empire 5. Kingdom of Kush 6. Kanem-Bornu 7. Kingdom of Kongo 8. Asante Empire 9. Almohad Empire 10. Oyo Empire