Good call.
Jose Gaspar Rodriguez de Francia 1766-1840.
Or, as he preferred to be addressed, "El Supremo". He was Paraguay's first dictator, and under him Paraguay became a sort of prototype socialist state a good 100 years before it became trendy in the world at large. Dr Francia gets a mixed press- he was far from the average totalitarian dictator because certainly wasn't a corrupt man. Every day he withdrew a miserly two pesos from the treasury to fund his entire household needs. He was ruthless in his pursuit of the corrupt, and the state treasury's coffers swelled handsomely under his control.
However he was murderously egocentric. Anyone, without exception, failing to accord him the respect he felt he was due was immediately executed on the spot. He ruled without ministers wielding sole and total control of the nation. Being vehemently anti-religion he seized all church property, persecuted the clergy, and for a time made marriage illegal. He also banned fiestas, abolished every form of social distinction, closed all colleges and had all dogs shot (he didn't like dogs much).
Hating the aristocracy, and the racism they displayed to the Indians, he passed incredibly draconian marriage tax laws to ensure that the only people the landowners could afford to marry were native Indians. This worked rather well, and helped avoid racial conflict in the country, so he made mixed-race marriage compulsory.
Paraguay's borders were closed and it became a hermit state. Uninvited foreigners were imprisoned for years, while other immgrants simply had all their property confiscated. El Supremo liked confiscating things.
If you want a flavour of what this prototype Stalin was like, examine how he treated his own family. His sister married without his permission, so he had her husband shot. And the priest who married them. His sister disappeared, presumably bearing more bullet-holes than previously. Finally, when he realised that his daily allowance of two pesos was not enough to feed both himself and his daughter, he generously legalised prostitution so that she could lawfully earn a living. Bless him.