I checked for "deserving" leaders but would like to emphasize that this - for me - means just "real" leaders, that is, people who really have run the state.
A good example for this would be Bismarck, who wasn't head of the state (that was the King of Prussia, later the German Emperor [note: not Emperor of Germany!] and King of Prussia), but head of the government. Nevertheless, he is the symbol of a certain era and the policy of that era run by the state which he ruled.