Answer:
If those are my choices, the answer is Mussolini without question. Mussolini was actually very successful until, like millions of other people both in Germany and abroad, got mesmerized by Hitler and went down a very dark road with him. Mussolini had every chance in the world to be remembered by history very differently than he is. All he had to do was make better choices in friends.
Here is also why they all suck:
-Hitler: The most racist and most unforgiving of the bunch. I think its fair to say I hate this guy the most out of everyone else on the list.
-Mussolini: A joke compared to Hitler, but still a very terrible person.
-Mugabe: Wait, so he’s 94 years old and he’s married to his ultra-materialistic 52 year old wife Grace? Sorry, I only know him by his overthrow and his wife.
-Mao: Narcissistic, indifferent to the deaths he caused based on a combination of stupidity and ruthlessness. Very successful, and known as “the Chinese Stalin”.
-Saddam: Tries to be like Stalin and Hitler, it did not end well for him.
-Stalin: Ruthless, sneaky and possibly the smartest of the bunch. Very successful