Mobutu Sese Seko -$5bn
In his 32 years as dictator of Zaire (the Democratic Republic of the Congo), Sese Seko's energies were chiefly directed at increasing his personal fortune, which in 1984 was estimated to be nearly US$5bn, most of it in Swiss banks. This sum was almost equivalent to the country's foreign debt at the time. Sese Seko owned a fleet of Mercedes vehicles which he used to travel between his numerous palaces while many of his people starved.
National Movements and New States in Africa