Suggestions by @jesselee

P.T. Flea

as Best Uncle in Best Family

Bing Bong

as Best Brother in Best Family

Van (Cars)

as Best Brother in Best Family

Molt (A Bug's Life)

as Best Brother in Best Family

Battle of Wits (Princess Bride)

as Best Brother in Best Family

Mr. Woodley (Animal Crackers)

as Best Brother in Best Family

Gilbert Huph

as Best Brother in Best Family

Elastigirl (Helen Parr)

as Best Mother in Best Family

Mr. Incredible (Bob Parr)

as Best Father in Best Family

Rick Dicker

as Best Grandfather in Best Family

Grandmama Addams

as Best Grandma in Best of Characters

Kari McKeen

as Best Aunt in Best Family

Mirage

as Best Grandmother in Best Family

Voyd

as Best Daughter in Best of Characters

Evelyn Deavor

as Biggest Karen in Best & Worst of Fictional Characters

Kayla (The Addams Family)

as Biggest Karen in Best & Worst of Fictional Characters

Layla (The Addams Family)

as Best Sister in Best Family

Uncle Fester

as Best Brother in Best Family

Bethany (The Addams Family)

as Best Aunt in Best Family

Lurch (The Addams Family)

as Best Uncle in Best Family