Or perhaps drop the “oxy”

A tyranny sincerely exercised for the good of its victims may be the most oppressive. Those who torment us for our own good … do so with the approval of their own conscience. They may be more likely to go to Heaven yet at the same time likelier to make a Hell of earth. This very kindness stings with intolerable insult. To be ‘cured’ against one's will and cured of states which we may not regard as disease is to be put on a level of those who have not yet reached the age of reason or those who never will; to be classed with infants, imbeciles, and domestic animals. C. S. Lewis

In other words, “benevolent dictator” is an oxymoron.