I was thinking..the X Men during the early 80's, the Fantastic Four during their first 100 issues back in the Kirby - Lee days, and even the Legion during the Shooter - Swan era ( 1965 to 1969 ) had this in common..... a sense of being a family.
Must include the Avengers from the Stan Lee - Roy Thomas - John Buscema era during the 60's, too. There was more of a sense of family in the X Men and old Fantastic Four stories....But in a group comic book, there OUGHT to be a sense of family, because often times, the group becomes a sort of surrogate family. One or more members may have no real family, and the group becomes their family... Or the group is a bunch of outcasts and become a family.