Occasional recurring character, yes. Main character, no. The show is already juggling seven main characters, and with only 20 minutes to fill, it's often a struggle to find meaningful things for them to do (Raj, in particular, often gets the short end of the stick). They can't have everyone become part of the core cast. Plus, as Tensor said, Margo Harshman has a recurring role on NCIS and possibly has other projects lined up as well, and doesn't have time to devote to TBBT in anything other than an occasional guest appearance. And IMHO, using the large cast of a TV series that lasted only three seasons on network television (and one on Netflix) as an example doesn't exactly bolster the argument.
Use all the winky faces ya want, AD is a critically acclaimed sitcom. Everyone that's a true fan of the show knows why it didn't last longer than 3 seasons on Fox. The critics loved it, and fans who watch it in reruns love it. So, yes, using a critically acclaimed half hour sitcom that had such a mass following that it ended up coming back for another season (and possibly more) on Netflix is a very good example to use...IMHO.
ETA: This is from the show's wiki page:
Throughout its original run, Arrested Development received overwhelming critical acclaim. It is widely regarded as one of the defining comedies of the 2000s and has been praised by many critics as one of the greatest comedies of all time. In 2007, the show was listed as one of Time magazine's "100 Best TV Shows of All-TIME."
Tim Stack of Entertainment Weekly praised the series, saying "Is it beating a dead horse to once again state that this underappreciated gem is the best sitcom on TV? Too bad. Arrested Development is the best sitcom on TV!"
David Bianculli from the New York Daily News stated "If you're not watching this series on Fox, the least you can do is buy it on DVD. You'll love it, and it's such a dense show (in the best sense of the word) that it rewards repeated viewing. Like Scrubs and the British version of The Office, it is the sort of show that truly deserves to be seen uninterrupted, several episodes at a time, for maximum enjoyment. The laughs-per-minute quotient here is insanely high, making it great value as a home library purchase."
Alison Powell of The Guardian said "As Hollywood agents worry about the demise of the town's lowing cash cow, the multi-camera, staged sitcom, here to save the day is Arrested Development, a farce of such blazing wit and originality, that it must surely usher in a new era in comedy."
Gillian Flynn of Entertainment Weekly named Arrested Development the best television show of 2005 and said in her review that "As oddball as Arrested is, it's also humane. A flawless cast—from Will Arnett's breathy, bombastic Gob to Jessica Walter's boozy Lucille—grounds it, aided by Ron Howard's affable narration. Of course, the center of sensibility is good son Michael (Jason Bateman) and his even better son, George Michael (Michael Cera). Bateman and Cera give the best reacts around—the former all weary exasperation, the latter adorably bunny-stunned. Together, they're the sweetest, awkwardest straight men on the smartest, most shockingly funny series on TV...which is likely canceled, despite six Emmy wins. It's a perversion not even the Bluths deserve." In 2012, Entertainment Weekly listed the show at No. 2 in the "25 Best Cult TV Shows from the Past 25 Years," praising its "fast, delirious, interlocking jokes that don't pander to the masses; winky gags (e.g. fake preview scenes for the following week's episode); and a cast of absurd characters."
Edited by HollyAndOatmeal, 29 October 2013 - 10:05 AM.