Sam (Then You Were Gone, by Lauren Strasnick)Read about the other entries on the list.
Strictly speaking, Sam isn’t anyone’s dad, he’s the live-in boyfriend of main character Adrienne’s mother. That said, as a father figure, he’s one of the most present and caring I’ve seen in YA—a standout feature in its own right that’s magnified times infinity when you take into account how rarely nontraditional family structures receive a positive portrayal.
--Marshal Zeringue