I have not seen the movie yet. I saw a video comparing the scene between Tory and Cory as played by James Earl Jones and Denzel Washington. For my money, there is no comparison; Jones was powerful and scary; Washington was just shouting.
Years ago, I read Wilson tended to dismiss Fences, but I don't remember why. In some ways, Fences might be thought of as a star turn; the other nine plays are ensemble pieces.
As for comparing Fences to Death of a Salesman, that may have started with Robert Brustein. Brustein hates Arthur Miller's plays, so any play that is similar in anyway must be dismissed. I don't recall him ever liking any play by Wilson. Back in 1997 there was a famous discussion with August Wilson and Massa Brustein. Here's the link to the NY Times article. http://www.nytimes.com/1997/01/29/theater/face-to-face-encounter-on-race-in-the-theater.html
There is a theatre in Portland, Oregon, Portland Playhouse, that has staged a number of Wilson plays with artistic and box office success. They produced: Radio Golf, Gem of the Ocean, Ma Rainey's Black Bottom, The Piano Lesson, Jitney and King Headly II. In the fall they produced Wilson's one man autobiographical play HOW I LEARNED WHAT I LEARNED. The runs of each production were extended.
The Oregon Shakespeare Festival has produced: Gem of the Ocean, Joe Turner's Come and Gone, Ma Rainey's Black Bottom, The Piano Lesson, Seven Guitars, Fences, and Two Trains Running. As part of their 2017 season, they are presenting the World Premiere of August Wilson's poetry in Unison, a new musical by UNIVERSES in association with Constanza Romero.
To me, August Wilson is one of the greatest American playwrights. He wrote about specific times and place, in doing so his plays can speak to anyone. Do his plays depict THE AFRICAN-AMERICAN EXPERIENCE? No, but this does not diminish he plays. In the United States, theatre should produce and schools should teach plays by other African-American playwrights.