As for me, the most colorful despot and dictator was Emperor Bokassa of the Central African Empire.
http://banknotegallery.blogspot.com/2012/10/equatorial-african-states-10000-francs.html
Central African Republic 500 francs http://banknotegallery.blogspot.com/2012/10/currency-of-central-african-republic.html
Central African Republic 1000 francs http://banknotegallery.blogspot.com/2012/10/central-african-republic-currency-1000.html
Central African Empire 10000 Francs http://banknotegallery.blogspot.com/2010/05/central-african-republic-10000-francs.html