I saw a thread for the book's characters, but I didn't find one for the movie. In my humble opinion:
Father Nate : ESFP
Mother Isabel: ESTJ perhaps ESFJ
Via: ENFJ or INFJ (leaning towards ENFJ)
Jack Will: ESFP
Miranda: ??? needs validation and builds up a lie to seem cool. Could be anyone.
I think Auggie is a strong Fi type, Via is very Fe. Isabel is the one who has a hold on everybody and everything, kind of like Claire in 'Modern Family'. Nate is easygoing, but has very deep feelings (Se with secondary Fi). Jack Will is the perfect representation of an ESFP child: fun-loving, easygoing and not too serious. Summer is a lovely character whose calm energy makes me lean towards ISFP.
What do you think?