According to the site http://www.tvtome.com/tvtome/servlet/PersonDetail/personid-7413
Diller starred in The New Scooby Doo movies in 1972 but as herself
The Muppet Show in 1977 as herself
In 1993 she played Mrs. Peterson in Blossom
If you go to the site.. you will see she has worked almost continously from the 1960's until the current time. (This amazing woman is still working at age 86!) The shows she has been on are all named on that site.. I am not sure if she starred with other characters in some of the other TV shows she was on.. but the only one for the 70's and 80's were the ones named above.
I hope this helps!
Below is a link of all the Children's Television Programs which aired in the 1970's....perhaps you may recognize one of them:
Television in the 1970's - Children's Television - Nostalgia Central
Peace, Love & Happiness,
The Mystic Wave