The official, factual side
As unsatisfactory as that might sound @JMS is rightly focussing on first Göring and then Dönitz/Goebbels, although the later declined to survive so that Schwerin von Krosigk was stepped up.
But that is really it, as this is most typical of a dictatorship that is based on the love of the people for that very person. This is ...
Had things gone his way, how did Hitler imagine his succession?
Health of Adolf Hitler
Hitler's physical health has long been the topic of speculation.
Physically Hitler suffered from tremors and irregular heartbeat during the last years of his life. Hitler's personal doctor Dr. Theodor Morell diagnosed him with ...
There are earlier references to this song, however, the most complete version of this song I was able to find was this one.
It not only includes much clearer audio than any other version, it also has a speech at the beginning over an instrumental of the song, confirming that the instrumentals and vocals were ...
If you accept a Western Roman Emperor as a dictator, then Vetranio (March to December 350 AD) may qualify. This somewaht obscure emperor was deposed peacefully by Contantius II:
Constantius first met with Vetranio at Serdica.... On 25 December 350 both men mounted a platform
before the assembled troops; Constantius managed, by means of a strong
Nazi Germany's Euthanasia murders would probably not have been possible without a reasonable amount of collaboration from the medical sector. Not sure if that is relevant to your question, however.
I think your lumping together of authoritarianism and corruption is not particularly useful. The two sometimes come hand in hand and sometimes not. E.g. I would ...