Flanders’ delivery of one-liners was near perfect (from his intro to that “patriotic” song):
“No matter what you may say about the Germans, and who doesn’t?”
I do a bit of after-dinner work, and he and Newhart, both of whom I listened to as a kid, are models. The way Newhart enunciates “the heater” in The Driving Instructor makes a brilliant line even better:
“Oh, while you are turning the lights off, why don’t you turn off the heater?”