The tags cast has done so many cartoon voices. I picked up on it when I was a kid watching the cartoons.They certainly always found work, and had unique voices. Many certainly must of had rapports from their cartoon work. A few off the top of my head.

Howard Morris- Mush Mouse, Breezly Bruin, Beetle Bailey, Atom Ant
Morris & Alan Melvin- Magilla Gorilla
Sterling Hollaway (Bert Miller)- Winnie the Pooh
Hal Smith (Otis)- narrator Clutch Cargo
Howard Mcnear.(Floyd)- doctor on The Flintstones

They even continues into the 70s-80s

Andy Griffith (narrated Third Frosty the Snowman special where Frosty finds a girlfriend)

Don Knotts (Himself on two The New Scooby Doo Movies)

Hal Smith (Josiah Who in Halloween is Grinch Night, Multiple roles in Pontoffel Pock where are you? Winnie the Pooh in the Christmas Special, and Maurice's Horse in Beauty and the Beast)

Irene Tedrow (Mariah Who in Halloween is Grinch Night)

George Lindsey (The Aristocats, The Rescuers)