Would Murray Rothbard count as a philosopher? I know he was an economist and historian but I have found his anarcho-capitalist thought very influential on my own thinking.
Discussion
I am a great fan but I think almost everything in Rothbard can be found in some combination in Gustave de Molinari (the first anarcho-capitalist), Robert Nozick, Ayn Rand, Frederic Bastiat, Franz Oppenheimer, Joseph Schumpeter, John Locke and Ludwig von Mises.
Rothbard is is consistently pro-liberty and doesn't shy away from radical/extreme conclusions that come from seemingly-solid premises.