Which of these actresses was the first to appear as a "TV Mom" in a TV series?

Harriet Nelson (formerly Hilliard—b. Peggy Lou Snyder, 1909 – 1994) was an American singer and actress. Harriet is best known for her role as the mom on the TV sitcom "The Adventures of Ozzie and Harriet". This show preceded others.

In 1944, the Nelson family began a domestic-comedy series for radio, "The Adventures of Ozzie and Harriet". It was highly popular and made a successful transition to television. It was one of the stalwarts of the ABC-TV schedule from 1952 to 1966. The Nelsons' two sons, Ricky and David, were featured continuously on the show with their mother (Harriet) and father (Ozzie) .

"Father Knows Best is an American" sitcom starring Robert Young, Jane Wyatt, Elinor Donahue, Billy Gray and Lauren Chapin. This TV series debuted on CBS in October 1954. It is about the lives of the Andersons, a middle-class family living in the town of Springfield, USA. Jane Wyatt (1910 – 2006) was Margaret Anderson, the mother.

Barbara Billingsley (b. Barbara Lillian Combes, 1915 – 2010) was best-known for her role of June Cleaver, the mother in the TV series "Leave It to Beaver" (1957–1963).

Donna Reed (b. Donna Belle Mullenger, 1921 – 1986) was an American actress. Her career spanned more than 40 years. Reed is known for her work in TV, notably as Donna Stone, a middle-class American mother and housewife in the sitcom "The Donna Reed Show" (1958–1966). Her character was more assertive than most other TV mothers of the era.