Time line of monsters

I was rather disappointed to see the thread on timeline of explorers deleted following my query with regard to the inclusion of certain dubious historical figures. It made me think though why not have a timeline of monsters?

I'm not a historian and so would require help on this but for starters here are a few

Henry VIII
Joseph Stalin
Adolph Hitler
Pol Pot
Idi Amin
Augusto Pinochet
Sadam Hussain

The kind of candidates suitable for this timeline are individuals responsible for reigns of terror or mass murder whilst in some senior political and/or military position. This effectively rules out terrorists who thankfully do not hold such office, but does, most definitely, includes individuals who have sponsored terrorists whilst in such office.

An interesting inclusion would be individuals from American history. Who was principally responsible for the extermination policies against the Native Americans? Equally whose idea was it to starve the Indians by exterminating the bison? Would these acts not qualify for reigns of terror or acts of mass murder?

Perhaps someone is familiar with British exploits and can recommend someone from our colonial exploits in Asia and the Pacific?

And what about Spain?s triumphs in Latin America or Australian programmes against the Aborigines?

Any thoughts or recommendations?

Regards.