LOS ANGELES—Dawn Wells, who played the wholesome Mary Ann among a misfit band of shipwrecked castaways on the 1960s sitcom “Gilligan’s Island,” died Wednesday of causes related to COVID-19, her publicist said. She was 82. Wells died peacefully at a residential facility in Los Angeles, publicist Harlan Boll said. “There is so much more to Dawn Wells” than the “Gilligan’s Island” character that brought her fame, Boll said in a statement. Besides TV, film and stage acting credits, her other real-life roles included teacher and motivational speaker, Boll said. Tina Louise, 86, who played Ginger the movie star, is the last surviving member of a cast that included Bob Denver as the title character; Alan Hale Jr. as the Skipper; Jim Backus and Natalie Schafer as wealthy passengers Thurston and Lovey Howell, and Russell Johnson, known as the Professor. Wells, a native of Reno, Nevada, represented her state in the …