I want to say before I begin that any politician should be proud to have their name on this list. I realize that my opinion is not as highly valued as all the political analysts out there, but each of these people stand out as examples of effective, beneficial leaders. I have linked each name to its wikipedia page so that if you don't know who they are you can check them out. (Sorry the links are hard to read! Hover over them and you should be ok!)
Paul Kagame - has turned Rwanda into one of the safest, most advanced countries in Africa in the 17 years since the genocide
Vladimir Putin - Has he killed a lot of people? Probably. Has he done more for the recovery of Russia from its years of economic and political backsliding than anyone else? Also probably.
Nelson Mandela - There's still a lot to be done in South Africa, and he really is more of a figurehead, but he has remained so dedicated in his work for the people he loves.
Barack Obama - You all knew this was coming. He is saving the USA internationally and internally, but the country is too self-absorbed to recognize how great he is.
Abraham Lincoln - Pulling a country together after a civil war is no easy thing. Doing it with as much class and beard as he did? Nigh impossible.
Queen Victoria - Have you seen this lady's empire? Madness.
Queen Elizabeth I - Shows how much a lady can accomplish if she doesn't have a silly man to take care of. I really admire her for pulling together a country that was at war with itself and Spain, and for not getting killed. Also, she was a wonderfully eloquent and educated person.
(Do queens count as politicians since they weren't elected? Neither of these ladies were ousted either, so that is to their credit.)
Hugo Chavez - He is outspoken, Socialist, effective, and good to his people. That is really all I ask.
Aung San Suu Kyi - She's been in jail most of her life. She was given 3 years of hard labour when some American dick-wad decided to swim to her house while she was under arrest. There's something to be said about perseverance, eh?
William Lyon Mackenzie King - Crazy smart and crazy crazy. I think he was sickeningly effective, but on the downside he is the main culprit for the navigational mess that is Ottawa.
That's all I can currently think of. I can see that there are a lot of holes in my knowledge of political history, specifically in the Middle East and Indo-China.