Amy and Rory got two, "Christmas Carol" and "Widow in the Wardrobe".
Clara now has three, "Snowmen", "Time of the Doctor", "Last Christmas".
But Amy also appears in "Time of the Doctor" so you could say it is a tie.
Steven, Sarah Kingdom, Astrid, Rose, Jackson Lake each have 1. I think Wilf and Donna each have 2, but for different reasons.