Not Hobbes, Locke, and Rousseau. [contrarian]
Not Hobbes, Locke, and Rousseau, but Smith and Bentham articulate liberalism's basic problematic and principles. Put another way, for Foucault, there is no significant divergence between economic and political liberalism when they are viewed from the perspective of the economic orientation, limitation, and legitimacy of government and from the perspective of the subject of interest.
Wendy Brown, Undoing the Demos, loc. 100