Okay, I am not a fan of this list because it clearly takes into account what some of these performers did outside of the show. Eddie Murphy is ranked number one, and he was great, but he was only on the show long enough to produce a handful of truly great sketches. I'd bump him down.
-Tina Fey at 10. Aside from the Palin stuff, which came up when she was a guest host, her stint as a performer was limited to Weekend Update. Where she was great, but not top ten material.
-Seth Meyers and Abby Elliot, also too high. I would rank Meyers close to Dennis Miller for obvious reasons, while Elliot is really funny, but barely a utility player. This isn't every cast member, btw - where's Vanessa Bayer, who came on and absolutely lapped Elliot on the depth chart? Jenny Slate?
-Koechner, too high. I loved him, and he was great on the show, but only one season. Gotta be penalized.
-Forte is ranked below McKinney and McKean - bullshit. Forte is at least top fifteen. McKinney and McKean are great, but they brought nothing to the show. Actually McKinney did a totally cruel Jim Carrey impersonation in The Mask-era, so kudos for that.
-Jeff Richards was on the show for three years?