Here is a great photo story with complication about a teenager with a developmental disability and his relationship with his family that was nomimated for a pulitzer: https://www.pulitzer.org/finalists/craig-f-walker-boston-globe

I choose this story because it really shows a dynamic between the child and his mother, and shows the complexity of the relationship as much as his autism. It creates a structure that is really three-dimensional in it's scope. Most photo essay's only ever are one or two dimensional, in that either they very simple in terms of only dealing wtih an issue or are a personality/portrait story, or a story about a relationship without any other underlying issues, this three dimensional in how it focuses and humanizes as well as his parents, shows the relationship but also delves into the issues he faces which is hard to get all three elements to work in tandum for a strong narrative or photo essay.