https://www.metv.com/lists/some-andy-griffith-show-actors-also-voiced-memorable-product-mascots

You can find Ernie Keebler, Mayor McCheese, Tony the Tiger and more in Mayberry!

Hal Smith also did a lot of voice work

Howard Morris was also the voice of the koala on the Qantas commercials - “I hate Qantas".

Howard Morris also did a lot of other voice work, Hanna Barbera for sure--Flintstones, Jetsons, etc.

Ditto for Hal Smith-the Art Clokey Davey and Goliath episodes in the 60s, probably more.

Busy people, back then!