Architects are often portrayed in film, but urban planners seldom make it to the silver screen.
The only planner characters in movies I can think of are Michael Fry in “The Secret Life of Muchael Fry” and … well, someone in the slacker film “Singles.” That’s it.
Steve Dunne (Campbell Scott) of Singels was what I thought of when I read the title. But I see you’ve mentioned it already so I’ve nothing to add except his name.