Regarding COM read the book a couple of times and saw the movie a couple of times. Neither one was a knock out although they fared better than 'The Baltimore Bullet' and way way way better thaN 'Pool Hall Junkies' which was a complete joke of a movie if you could even call it that.
In the COM book there was a character toward the end by the name of Earl Borchard I believe who was obviously based on Strickland.
The Hustler movie and book stand on their own as being untouchable.
I had a pool movie collection years ago, but sold it on eBay at some point. There was a darker movie that wasn't bad, except it was a low-budget film with bad lighting. It was called "Chalk".