I think such a listing would be a good idea for this site. Joe Besser and Joe DeRita appeared on radio shows in the 1940's and 1950's. It would be nice to have all such shows accurately and completely logged.
Joe Besser was on some Jack Benny radio shows as well as Benny's TV shows. I have several old cassettes of Besser and DeRita radio appearances.
Coincidentally just today I received a set of Connee Boswell Shows a friend sent me, including the episode of May 13, 1946 on which Joe Besser appears.
Ted Healy appeared on a few episodes of the series "Good News of 1938". Those should be listed as well.
And for up-to-dateness, the appearances over the last couple of years by Joan Howard Maurer, Paul Howard, and Shemp's family on the internet radio show "Stu's Show" could also be included.