Matt Groening is a viable possibility, yeah?
Trey Parker and Matt Stone made clear their stance in 2004 with Team America and I recently heard they're most likely to support Hillary on the basis of how strange it would be to have her as president, which is very unfortunate to hear. Perhaps they'll come around and at least find a way to parody the neocons in some slight form by the time the second half of this season kicks off. With you 100% on that, mdh. Name recognition is vital. I personally still hear "who's Ron Paul?" too often for a guy vying for GOP nomination.
Hugh Hefner, Snoop Dogg, Tommy Chong and Howard Stern would provide an edgier support, but almost any support is beneficial. Honestly, I think there's a breaking point Faux News will reach where their smears will eventually rub their viewers the wrong way, but they've yet to max out.
A strong, relatively controversy-free candidate for support with good media reach on ABC's 20/20 is John Stossel. He's announced his support at recent lectures in New Hampshire, but I wish he'd be more vocal about it. According to Students for Ron Paul, he finds Paul intriguing in thought, but a bit dull as a speaker.
Chris Rock is another potential supporter, as well as Keanu Reeves. (a bit of a sidenote, but did anyone besides myself enjoy the film adaptation of A Scanner Darkly?)
The main problem lies in finding a way to get any of these celebrities involved, especially when the only news on cable television demeans the man (as well as ourselves...all 83 of we 'viral' beings) and he's only included in polls after we write in requesting fair treatment.