Ego massaging which is the hallmark of most African Leaders has no place in sincere and honest leadership. Their lack of vision compels them to project themselves. Their role after the job will be non-existent. Legacies are not in cement and mortar but in the hearts and minds of the people you were fortunate to be placed in-charge. Memories last longer in the hearts and minds of people much more than in lifeless buildings and constructions that may be a way of projecting one's ego.
People often know when leaders are sincere.
It is the case of a shepherd and the sheep. The shepherd is to protect the sheep at all times. With the exception of a handful of African ex-presidents like the Mandela, the rest should retire infinitum, wash their hands off politics, local or international, allow impeccable and vibrant young Africans to rule. Those former presidents should have high standards of morality, ethics and impartiality for them to merit the trust from everyone. Which is easy enough to answer.