Tanzania, is a internal success story in Africa. The Southern Botswana and Zambia I think hold better ground to that claim.
BUT!!!!
Zimbabwean President Robert Mugabe was a great one to make change for local people.
That turned out well didn't it.
Tanzania may do well or better out of this as far as aviation but who knows? Air Bots lost all its flying fleet a few years back, are they better or worse for that suicide fleet destruction?
I consider this Central Africa, but personal opinion -
http://www.cultureconnect.com/maps/cafrica.jpg