"Go'el" Family: Happy ending. Thrall and Aggra married, bought a hut in Outlands, made two babies, Thrall defeated the assassins sent after his family.
Proudmoore Family: Happy ending. Katherine forgave Jaina, Tandred was saved, Derek is undead but was rescued from Sylvanas and owns a cottage in Kul Tiras anyway, so he can see his family whenever he wants.