Writer Donald Liebenson ranks every episode of The Dick Van Dyke Show, best to worst. None of us who love the show will ever agree with anyone else's list but I do concur with his first place pick ("Coast to Coast Big Mouth") and his last-place selection ("Uncle George").
I would place "All About Eavesdropping" and "Somebody Has to Play Cleopatra" way lower and "The Gunslinger" and "Talk to the Snail" way higher. I would move up most of the episodes that have Alan Brady in them and move down most of the ones that are in any way about the marriage of Rob or Laura being in any way threatened by either being jealous. The episode that I went to see filmed is #133 and I think that's about right. Interestingly, his Top Ten includes both episodes that call upon us to imagine Laura Petrie naked.