Putin is almost entirely lacking the cult of personality, the movement, around him that Hitler, Mao, Stalin, Lenin, Fidel, etc. all had. He wasn't a revolutionary, he's primarily a gangster, and historically those are relatively short-lived and weak political types. Putin has more in common with Capone than Hitler, he leads a cult of money and theft.

Even Putin's attempts at nationalistic projection have been remarkably pathetic by historical comparison. Putin's dominance of Russia won't leave the mark / impact that other far more dangerous people throughout history have. Stalin would eat Putin for lunch.

I expect Putin to be forced out of office, rather than die in office. If Putin's inner circle wanted him gone, he'd be gone tomorrow. Eventually they'll tire of him.