Submitted by GamblerShinobi t3_11xm9pt in television
I used to wonder this a lot, and I guess it depends on what you consider a sketch comedy show. Some variety/talk shows do sketches. Keeping in mind, I'm not talking about who has been in the most sketches, I think that would go to Keenan Thompson from his long career at SNL and All That.
I could name a ton of people who appeared in at least two based on watching SCTV, SNL, In Living Color, MadTV and Chapelle's Show. But two isn't a lot.
My best guess is Keegan-Michael Key. He was a cast member on MadTV, starred in Key&Peele, and hosted an episode of SNL. After browsing his Wikipedia page, he's done voices on Robot Chicken, appeared in w/Bob and David, and did a sketch on Last Week Tonight with John Oliver. While the last one is a comedy news show, it does regularly have sketches to end episodes. So I would count that as six for Keegan.
But there's a lot of sketch shows I haven't seen. Michael Che's, I Think You Should Leave, the new Kids in the Hall, etc...
I'd love to hear others' guesses. I might discover some new favorite sketches in the process.
UHeardAboutPluto t1_jd3vc7b wrote
Bob Odenkirk: SNL; The Ben Stiller Show; Mr. Show (multiple iterations); Crank Yankers, Tim and Eric (multiple variations); Sarah Silverman Project; Jon Benjamin Has a Van; The Birthday Boys; Comedy Bang Bang; Bob and David; Drunk History; I Think You Should Leave.