Don't forget the Ford family:
Mother + 2 adult children and 2 children
And the Asplund family:
Parents + 4 young sons and 1 young daughter.
The Asplund family was the only large third-class family to have any surviving members - Mrs. Asplund and children Lillian and Edvin were saved while Mr. Asplund and sons Filip, Clarence and Carl were lost.
In response to Hildur's post, both parents were with the Skoog family.