Oooh! So would Harlan Ellison! 
Ok, that website is HILARIOUS. There’s a picture of Britney sitting in a bathtub full of diamonds and holding a particularly big gem up to her eye with the caption: Figure 8. Diamonds might be a girl’s best friend, but their crystalline structure is closely related to the zincblende structure.
There’s also a positive side. < aviator shades smiley here >
Why would Sarah Silverman get banned? Don’t we all love a little TMI, 'specially with sex sprinkled on?
Bad: Tucker Carlson. But it would be fun to watch.
Sarah Silverman? She’d work. Hell, lobstermobster’s style reminds me of her.
Big surprise for everyone: Alison Arngrim. Haven’t heard of her? Neither had I.
Very smart, observant, would scare me if I met her in person.
And as long as we’re raiding cemetaries, Richard Feynman.
Jerry Rubin’s head would explode long before he had a chance to be banned.
I wasn’t aware of James Dobson until reading your post; knowing what I do now, I agree with you.
However, the person that I initially thought that you meant was John Dobson, the “Sidewalk Astronomer”, who is a definite SDMB candidate. Born in China (his grandfather founded Peking University!), later a UC Berkeley chemist, Hindu monk, and inventor of the Dobsonian telescope, a rugged and affordable design intended for amateurs.
I first ran into him – almost literally – on a sidewalk on Corona Heights in San Francisco (near Twin Peaks), and we looked at Saturn’s rings together. He is now 92, which would make him the oldest Doper, and has some unorthodox views of cosmology, but is fully prepared to defend them. He’d have Great debates with Phil Plait (“The Bad Astronomer”).
Peanuts creator Charles Schultz would be a great addition.
Stephen King, Tabitha King, Naomi King, Joe Hillstrom King and Owen King would all be welcomed.
In the same vein as Charles Schultz, what about Bill Waterson? He has some great insights.