List from the Encyclopedia of Fictional People:

Aunt Bee Taylor (Andy Griffith Show)
Cora Dithers (Blondie)
Mrs. Doubtfire (Mrs. Doubtfire)
Hazel Burke (Hazel)
Edna Garrett (Diff'rent Strokes/Facts of Life)
Miss Ellie Southworth Ewing (Dallas)
Aunt Esther Anderson (Sanford & Son)

Can you think of anyone else? I pick Alice Nelson (Brady Bunch), Mammy (Gone with the Wind), Nell Harper (Gimme A Break), and Florida Evans (Maude/Good Times).

Victoria Barkley (The Big Valley)

Harriet Oleson - Little House on the Prairie

Rose Burton - The Waltons

Mrs. Hogg - Dukes of Hazzard

Mabel Thomas (mama) on Whats Happening

Kate Lawrence - Family

Any Reta Shaw character (she was a great character actor). She had this type down to a T the way Mabel Albertson had the whining pain-in-the-a** mother/mother-in-law down to a science.

Any Reta Shaw character (she was a great character actor). .
You stole my answer, LOL. I'll say Mama from That's My Mama.

Kate Bradley ("Petticoat Junction")