Well, I'm not a big TV watcher, but I've pondered this and included my picks below. What are yours?
1.) I Love Lucy — How can you not love Lucy? This is the classic comedy, a timeless combination of humor and personality to create plots you can rewatch and still laugh.
2.) I Dream of Jeannie — Jeannie is funny — simple as that. It seems to me that IDOJ is one of the last in the great line of 50's and 60's comedies. Just months before it ended All in the Family came on the air and changed sitcoms forever — but that light hearted innocence was still alive and well before that.
3.) The Beverley Hillbillies — How can you not like them? They are funny and truly do exhibit the kindness one encounters in the Ozarks. If only Granny wasn't so busy making moonshine! I've even seen their car (it is down in Holister, MO), so how can I not mention them?
4.) Leave it to Beaver — This is another timeless classic. It accentuates the “typical” American household and doesn't seem all that dated even though it ended its run the better part of half a century ago.
5.) The Cosby Show — Yeah, I have at least one comedy I like that isn't older than I am. Cosby will surely be one of the enduring classics of the last two decades.
Runners up: All in the Family (I don't like how it changed “the sitcom” forever, but I'll admit it, I like it); Gilligan's Island; The Jeffersons; Sanford & Son; Home Improvement.