There was Martin and Lewis, Kirk and Spock, Tommy Lee Jones and Will Smith, Buzz and Woody. Now there's Mark and Dayne (not saying they're clowns, just that they have chemistry).
I'm new to Mark, but have listened to Dayne for several years. Gotta say, they go together like peas n carrots. I enjoy the banter, yes, but more than that, they can soar without sounding esoteric or pie in the sky. One might excitedly fly off like a kite about an idea, but the other will hold the string to the ground, if you know what I mean. They really "complete" each other in this format. The show offers solid, real and useful content, not rah-rah pom-pom waving.
The podcast I love the best (so far, I'm still catching up) is The Art of Laser Focus. Sure, heard stuff like it before. But something about the way they break it down into daily living, and with personal examples from their own lives makes it fresh and accessible. And at about 13:40 minutes in, Coach Dayne describes laser focus in a way that made me stop and listen to it over and over. It grabbed me, and I saw mistakes I had been making. I'd call that a successful podcast!