In terms of the majority of people (i.e. NOT the people that visit figure skating boards on the internet), Peggy and Dorothy are still remembered as icons in the sport. Kristi, no. She has done amazing things, but she never secured the iconic status of Fleming and Hamel. But she's done better than Lipinski or Hughes, who havent established even Kristi-level legacy.
That can't be debated on a figure skating board where we are all so knowledgeable about skaters. Go into any sports bar and ask a die-hard football or baseball fan who has NEVER watched figure skating outside of the Olympics (and then only under duress) to name "a famous American figure skater", I would bet Fleming, Hamel and Kwan's name would be the top 3.