Mao Tse Tung killed 50 million people - a lot of them lawyers, and middle-men.
Pol Pot had 2 million on his tally when he died.
But Hitler sticks in the Western heads more than any or all of these. So much so, that we see his face in that of every child, the laugh of every baby, the face...of every cat?
http://hitlercats.motime.com/ My absolute favourite
Nothing better to do? No, probably not.