J.S. Mill who wrote “the only purpose for which power can be rightfully exercised over any member of a civilised community [but explicitly not what he considered to be a barbaric community], against his will, is to prevent harm to others” . Friedrich Hayek is another example. Another is Robert Nozick (Anarchy, State, and Utopia ).
As for British political humor, when Lady Astor told Churchill that if he were her husband she would poison his tea he replied that if she were his wife he would drink it. When MP Bessie Braddock MP said “Winston, you are drunk, and what’s more you are disgustingly drunk.” he replied “Bessie, my dear, you are ugly, and what’s more, you are disgustingly ugly. But tomorrow I shall be sober and you will still be disgustingly ugly.” The Americans are also not slouches. Sam Houston said about an opponent “He has all the characteristics of a dog save loyalty”.