Hans Herman Hoppe, he is THE libertarian at the moment and not in the lolbert sense. His most famous work is Democracy The God That Failed, but you probably know him best for the term "physical removal" which inspired all the helicopter memes.

While he is ultimately a hardcore anarchist, he is sympathetic to monarchy and has nothing but disdain for democracy. He has proposed a utopian vision of "a land of 1000 Lichtensteins" where monarchical city-states compete for citizenry to voluntarily associate with and disruptive peoples are regularly ejected with force.

Spez: Here is one my favorite passages:

A member of the human race who is completely incapable of understanding the higher productivity of labor performed under a division of labor based on private property is not properly speaking a person (a persona), but falls instead in the same moral category as an animal-of either the harmless sort (to be domesticated and employed as a producer or consumer good, or to be enjoyed as a "free good") or the wild and dangerous one (to be fought as a pest). On the other hand, there are members of the human species who are capable of understanding the insight but who lack the moral strength to act accordingly. Such persons are either harmless "brutes living outside of and separated from human society, or they are more or less dangerous criminals. They are persons who knowingly act wrongly and who besides having to be tamed or even physically defeated must also be punished in proportion to the severity of their crime to make them understand the nature of their wrongdoings and hopefully to teach them a lesson for the future. Human cooperation (society) can only prevail and advance as long as man is capable of subduing, taming, appropriating, and cultivating his physical and animalistic surroundings, and as long as he succeeds in suppressing crime, reducing it to a rarity by means of self-defense, property protection, and punishment.