Which totalitarian leader's peasant-based revolution do many radicals (especially in developing countries) regard as the guiding example of revolutionary organization in a rural society?

The answer is "Mao's".

China's peasantry assumed a crucial part in Mao's communist revolution. They helped his socialist powers overcome Chaing Kai-Shek's Kuomintang; for without the help and help of the peasants Mao's communist powers would have not been able to conquer the innovatively predominant Japanese and Kuomintang armed forces. Perceiving this, Mao based the revolution around the peasantry.