S - Marx and Engels for being the OGs, Lenin for doing it first
A - Mao, Stalin, Ho, Castro, etc. - they all actually did it
B-E - Unsuccessful leaders and major players in successful movements, plus major theorists; people like Zhou and Guevara can go here, Xi and Kim-the-younger too, probably the Black Panther leaders at the lower end
my list would be:
S - Marx and Engels for being the OGs, Lenin for doing it first
A - Mao, Stalin, Ho, Castro, etc. - they all actually did it
B-E - Unsuccessful leaders and major players in successful movements, plus major theorists; people like Zhou and Guevara can go here, Xi and Kim-the-younger too, probably the Black Panther leaders at the lower end
F - Weird losers, Pol Pot