He sang with The Knoxville Symphony and won a coveted Grace Moore Award for further study in New York City.
He played Cleveland Sam in Dressed to Kill and starred as Harry Stadling in the cult film Christmas Evil, both in 1980.
He then played George Elliot in the short lived NBC series Jennifer Slept Here with Georgia Engel and Ann Jillian in 1983.
For his role on Brothers, Maggart was nominated for four Cable ACE awards (for Best Actor in a Comedy Series) in 1985, 1986, 1988 and 1989.
In 1990, he had a guest turn on the Fox sitcom Babes, playing the ex-husband of Susan Peretz's character, Darlene Gilbert.