Richard Shepard’s brilliant character study Dom Hemingway is a down and dirty black comedy that’s equal parts bitter and delicious. Also, wasting no time giving credit where it’s due, this is his best film to date. But Shepard, a filmmaker not content to deliver just one kind of story, attempts to test out more than a few genres while chronicling this multifaceted former gangster. It’s crass and unapologetic and Dom himself is a walking calamity but he’s not completely without soul and that’s where Shepard attempts to establish a heartwarming through-line. That might make for a cumbersome story and, at times, Dom Hemingway has trouble finding its stride. Yet, as this all comes…