Zuma is a corrupt, authoritarian POS in the tradition of African rulers like Mobutu and Mugabe.

Nelson Mandela would be turning  over in his grave at Zuma's dictatorial machinations.

In addition to president Mandela, one other African leader springs to mind as a decent, honest, ethical, effective, democratic leader.

I speak of Nigeria's Olusegun Obasanjo who became head of state in Nigeria when his boss General Murtala Mohammed was assassinated in 1976.

General Obasanjo was top of his class at UK's Sandhurst Military Academy and rose rapidly in the army.  

As head of state, he planned and delivered on his promise to return the country to democratic rule and stayed in Nigeria on his farm with his general's pension rather than fleeing with millions of dollars of public funds.

20 years later, Obasanjo was drafted to run for the impossible job of Nigerian president and was elected.

I had the privilege to know Obasanjo during my consulting stint in Nigeria.  He was the real deal!