I know of two examples of this.

Lurch on The Addams Family uses Dobie Gillis characters' catch phrase "You Rang"

Dobie Gillis uses Jack Benny's catch phrase "Now cut that out"

Are there other ones? I'm not talking one offs like Edith using Archie's catch phrase "Stifle" in one episode of All in the Family.

Ann, One Day At Time, and Janice , Friends (not main cast but recurring) both used “Oh My God”

Ann would string it together “OhMyGod” while Janice would space it out “Oh. My. God”

On The Bill Dana Show Don Adams' character Byron Glick used "Would You Believe?". Lat3r his character Maxwell Smart used it on Get Smart.