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
Marat should definitely be referenced too, hardline revolutionary until the very end.
Also Adam Smith when it comes to liberal economic theory
Smith has to be one. He's literally the father of capitalism, and viewed it as revolutionary against the existing feudal order.
The fact that the European empires later weaponized it as colonial enforcement and industrialization came along shortly afterwards to finish off what he viewed as a way for guildsman to control their own destinies is a tragedy beyond his control.