Did any ruthless dictator have a peaceful ending?

[Ponietz]

3. And Google says...

The article lists Stalin, Mao, Franco, Baby Doc, Pinochet, Kim Il-sung, Kim Jong-il, and Idi Amin all dying in comfort of natural causes

https://www.realclearhistory.com/2019/12/20/how_dictators_die_211577.html

Live by the sword, die by the sword? For brutal dictators, the adage is more often than not completely false.

In fact, dictators and warlords are more likely to die of old age or disease than at the hands of an enraged populace or sneaky assassin, according to an analysis by Matthew White, author of "The Great Big Book of Horrible Things: The Definitive Chronicle of History's 100 Worst Atrocities" (W. W. Norton & Company, 2011). White's look back at history found that 60 percent of oppressive warmongering types l