"The Greatest" is a drama about a "messed up" family happened to be all "ruined" after Bennett's death, which leave them his girl and their baby.
The material,for me, seems to fit on a series. The story revolves around the whole family by piece, there the story of Allen's, Grace's, Ryan's and Rose's. A heavy drama movie yet not established as a "heavy" one.
I don't think the actors successfully done their roles, though it is indeed very challenging for them because the roles to be played requires an emotional actor-role attachment, a deep one.
The movie looks plain, supposed to be touching, but i didn't feel it.