If we are counting intended horror and not comedy, 28 Days Later is the only good zombie movie.
the "mature" tag on this one is no joke.
Takeshi Kitano says Sonatine is a film that wrote itself, and you can see that in how naturally it unfolds. I can't place it under any one genre because it isn't any one thing. The plot is basically, some yakuza are made to go to Okinawa (where the beaches are). All kinds of things ensue. It's a good time.
* = in this instance, "black comedy" refers to "dark comedy," a genre defined by making light of serious topics.
** = in this instance, "black comedy" refers to comedy works that feature primarily African-American cast and/or crew.