Aging Dictators

In the NY Times, Michael Backley argues that aging dictators are dangerous, so we should worry what Putin and Xi will do now that both are over 70:

Aging dictators have less time to reshape the world — and more memories of being obeyed at home and dissed abroad for their conduct. They become increasingly repressive and aggressive as power goes to their heads. Surrounded by sycophants, they make disastrous decisions again and again. They start pondering their legacies and wondering why they haven’t received the global respect they think they deserve or achieved the glory that would etch their names among history’s greats. They may decide that they don’t want to go down as a merely transitional figure. It’s a combustible combination: an autocrat who is overconfident and aggrieved and in a hurry. 

He offers Stalin's late purges, Mao's Cultural Revolution, and Kim Il-sung's sabre rattling as examples. That seems like too small a sample to me. Any others? I guess Ceaușescu was also pretty weird, but only to other Romanians. And I know there are stories about the bizarre surroundings of aging meglomaniacs, but that's not the same as threatening the world.