In the close but not quite category there are two other CR panels that are still with us from four weeks later (Daryl Anderson, Betty White, Jay Johnson, Susan Richardson) and five weeks later (Sharon Spelman, Steve Kanaly, Sal Viscuso, Jo Anne Worley). You can pretty much forget about MG 70s or 70s TTTT and WML and Password All-Stars (not even one week of TTTT 1980 fits).
Just for kicks I checked a couple of slightly later shows from this period to see if they had any full surviving week panelists as well or at least what their earliest one is.
HSQ (Davidson)
May 18-22, 1987 (Bob Barker, Ellen DeGeneres, Roger E. Mosley, Janice Pennington & Dian Parkinson, Wolfgang Puck, Smothers Brothers, Elke Sommer, Tim Thomerson, George Wallace)
TTTT (1990)
Week 4 (Ron Masak, Cindy Adams, Lynn Swann, Betty White)
The earliest fully surviving MG 90 panel is New Year's Eve 1990 (Bruce Baum, Vicki Lawrence, Brad Garrett, Edie McClurg, Roger E. Mosley, Pat Musick) One other non-CNR week is also fully surviving.