Re: 80 episode limit. I feel this should hold. 1) It is not easy to tell from most of the evidence whether the seasons were full season, partial seasons, seasons with a long “hiatus”. Also, just surviving a season doesn’t indicate success. B.J. and the Bear lasted four full seasons, and in that time made only 45 episodes. It was hanging by its teeth for its entire run. So, unless I hear lots of people who feel otherwise (and I don’t think anybody cares that much), I will continue to use 80 episodes as the threshhold for my list.
Robert Guillaume: Does not qualify. Soap and Benson are the same character. Sports Night does not qualify. Further, even if they were separate, Guillaume was only on Soap for two seasons.
Alfonso Ribeiro: Does not qualify. In the House only had 75 episodes and the last six of those were played by NBC at 1:35am.
Leonard Nimoy, redux: Does not qualify. As I said earlier, I am willing to combine TOS and TAS to give over 100 episodes of Star Trek. If you want I will count “The Cage” and give 80 episode of TOS. The problem is, that even with this, Nimoy does not qualify. He was on Mission: Impossible for only two years, and I have been ignoring narration work on non-fiction programs so In Search Of is out (but even if it isn’t there aren’t three shows to count).
William Shatner, redux: Questionable. I will move Shatner to questionable as it all depends on the run of Rescue 911.
Frank Welker: Qualifies. I have not been holding voicework against people (except for non-fiction narration).
Lorenzo Music: Qualifies. Note that Tail Spin does not count as it only had 65 episodes.
The Steve Allen Show: I had been ignoring this as I thought it was a talk show (wasn’t it a precursor to The Tonight Show? And as such, a skit player would not count as a major role. If that is incorrect, then consider that show counted towards their qualification.
THE LIST
[Note: Starred names indicate they fulfilled the
strict "U.S. primetime network television rule"
set forth in the OP]
Denise Alexander Richard Dean Anderson Rene Auberjonois
*Barbara Babcock *Lucille Ball *Bea Benaderet
Barbara Berjer Casey Casem *Tim Conway
*Bill Cosby David Coulier Jane Curtin
*Abby Dalton *William Daniels *Shelley Fabares
*John Forsythe Peter Graves Phil Hartman
David Hasselhoff *Bernie Kopell *Don Knotts
*Michael Landon *Heather Locklear Judi Evans Luciano
*Lee Majors Wendie Malick Howie Mandel
*Gavin McCloud *Alvin Melvin *Martin Milner
*Harry Morgan Lorenzo Music *Tom Poston
Burt Reynolds Dolph Sweet Frank Welker
Don Adams, Bill Bixby, Tom Bosley, Julie Kavner,
William Shatner Dick Van Dyke, and Betty White are questionable.