In short, my fantasy story is about a group of Altrans, the enslaved Devonians and a revolution to overthrow an evil empress. ...Except I think empires (especially evil ones) are way too overdone. I want to form another 'oppressive' government for my protagonists to overthrow. My idea was a blend of Stalinist Russia and Nazi Germany, and the leader (let's call her Tyrina just for the sake of example) is the head of this government. Question: How do you make it interesting and worth reading about? How do you make them seem well-rounded and evil enough for the readers to hate, yet sympathetic enough so they don't seem flat? And how do I avoid the typical "big bad guy sits there and does nothing" cliche? What should I have "Tyrina" do? Suggestions?