try Nekromantik , der todesking,midori shoujo tsubaki ,niku daruma or faces of death.
these are my favorites in the gore / disturbing.
point to nekromantik and niku daruma is pure rape / necrophilia.
der todesking and midori shoujo tsubaki is a bit depressin.
faces of death is total mishtropic.
you can try Lucio Fulci filmography, the troma movies and anothers splatter japoneses films.but the most is ironic/sarcastic themes.
would also quote cannibal holocaust, ilsa she wolf of the ss, Men Behind the Sun, thriller - a cruel picture (thats my fav) and visitor q