The Emmy-winning actress, who died at the age of 71 on Friday, was one of those performers who was simply a delight to see onscreen every time she appeared. She started with the improv comedy troupe Second City in Toronto and the show “SCTV,” where she helped define an era of Canadian comedy alongside co-stars including Martin Short, John Candy and Eugene Levy. As her career progressed, a through line could be found in many of O’Hara’s most popular roles: She excelled at playing a particular type of manic, upper-class female artist. This woman comes from a background of fame and wealth but has, for some reason or another, been exiled, left with just her narcissism and overinflated sense of artistic merit. She doesn’t seem to live in the real world, but rather some self-narrated series where she is the star.