Sailing (sailboarding) at the 1992 Summer Games in Barcelona.
soccer
Barbara Kendall in the Women's Boardsailing.
Tug-of-War in 1900
hockey
Basketball
That was Barbara Kendall in women's windglider sailing.
Rugby is not an Olympic sport. The last Olympics where rugby was a medal sport was the 1924 Games in Paris.
Andy Murray won the gold medal for men at the 2012 London olympics. Although he is from Scotland his medal counted toward the Great Britain total-- a first gold medal in this sport!
Sailing
Basketball
Women's Mogul
100 meter sprinting