Lufthansa, are you sure that Air Zimbabwe flew their B767s to Australia? I only remember the Qantas flights to Harare, but that's also a thing of the past... and has been for quite a while. I'm not sure that the ETOPS requirements would have allowed (or would currently allow) B767s operations between HRE
Anyhow, I can confirm that Robert Mugabe, pseudo-democratically "elected" dictator of Zimbabwe uses AirZim's planes on occasion: fortunately for me he stopped "hijacking" planes, in other words simply taking one out of the fleet, regardless if that plane is scheduled to fly a full load of passengers on an international flight or not...
I once had the dubious pleasure of flying on Air Zimbabwe's B767-200ER "Victoria Falls", Z-WPE, from Harare to Frankfurt (leaving HRE
on 13 Feb 2000) with "Comrade President Mugabe", including his wife and about half his government on board: I sat in the second row of Economy Class, all except the last row of Business Class was sealed off for him and his wife.
For security reasons, that meant boarding and leaving the plane through the rear exit - not that bad in Harare on a summer evening, but really awful in Frankfurt on a winter morning...
Other than that - I think I've rarely since (or before) experienced such a smooth takeoff and landing, not on AirZim, not on any other airline...