I'm not sure Chesterson deserves the epithet of apologist. Christian yes... evangelist, of a sort. I see him as a cut above the apologist class of Christian commentators.
I don't know that "apologist" counts as a natural class, but he definitely produced Christian apologetics. He may have preferred to call them 'refutations' of non-Christian or atheist doctrines.
Here's the new thread for posting quotes, with the usual rules: