Dr. Elliot Engle. As far as lectures go his were pretty good, full of witticisms and little tidbits of trivia that I love. He'd come to your school and give a talk about Shakespeare, Poe, or Charles Dickens and then that night he'd give a lecture to the parents about something more salacious like Gone with the Wind. I remember him telling us in his Poe lecture that Dickens met Poe in America and told him that their beloved family pet, a raven, had just died by drowning in a bucket of paint thinner, and that was the zeitgiest for Poe's famous poem (I reckon he squawked nevermore from the bucket and expired).
After the show parents would buy a little cassette tape of a lecture that they hadn't heard before and bring it home to listen to with the family. It's actually a pleasant memory, but after ruminating on it for a bit, I don't remember my dad going to the lectures, not that he was anti-literature, but he was a single parent with two kids. I think that I must remember going to friends' houses and listening to the tapes or maybe I would buy them on my own. Anyhow somewhere in there is a pleasant memory.
(Unfortunately his Dickens lecture is not free on Youtube, but there are others)