President Robert Mugabe is currently the best African president.
The simple answer is because the west hates him. Any African president the west hates means he is doing good job for Africans and refuses to serve foreign interests.
The better answer is that he has made Zimbabwe to the highest literacy country in Africa, the best universities, but also courageously took back the lands Europeans terrorists took from local farmers after killing many of them, forcing them out of their homes.
Other African president should take example from Robert Mugabe.