We know the heads of Marxism are usually Marx, Engels and Lenin, often plus Stalin and Mao.
But who would be the five heads of revolutionary liberalism (before it became a totally bankrupt, anti-emancipatory, status quo project)?
My suggestion: John Locke, Thomas Paine, Robespierre, Toussaint, & Simon Bolivar
Also considered: Oliver Cromwell and Garibaldi
That's an interesting observation. I wonder why theory and practice tend to go together for Marxist revolutionaries but not for liberal ones.
My idealistic guess would be the philosophical split between rationalism and empiricism, which is a lot less pronounced in Marxism. See: Where Do Correct Ideas Come From?
I don't know what material factors would influence this division