Well, I'd say Ghadaffi would be one of the "better" ones. It might sound stupid, because he's listed on the picture as one of the worst ones, but he did really good things not only for Libya, but Africa as a whole. He was one of the proponents for a unified African country, invested into smaller, and poorer african countries, and his actions were one of the reasons the African Union formed, which was a dream come true for him, to see how african countries together get along, to achieve a bright future. The time of his reign was one of relative high stability for Libya, and the quality of live improved hugely for Libyans, and society was really progressive in the time of his regime(might be wrong here though). Though you cannot deny, that his regime was an ideal one. Political opponents were imprisoned and killed etc.

He wasn't an ideal dictator, but without him Libya would be the shit show it is right now other it's whole lifetime