"A Family Funeral"

Hello, I am Gunner John Gaschler author of "I'm a skeleton in the ballroom". I am in need of a screenwriter that can write a dark horror comedy. It's about an elderly mans passing and how all the crazy and wacky family members go to pay their so called respects at his funeral. But little do they know each one with face an agonizing yet gruesome death. One by one they start to disappear. No one knows who is committing them murders nor knows where the bodies are. In the end, there is one person remaining which is the elderly mans ex mistress. Before her demise she screams "Why are you going to kill me" in a silly manner. The murder replies "well because the sex was terrible". In that moment we see them murderer that since the beginning was the dead man in the coffin getting his revenge on them all for making his life a living hell. At this point the old man looks into the camera laughs, heads to his coffin, pulls out a revolver, and shoots himself dead. The last scene contains the camera moving back where in the center lays the dead bodies in coffins. What I am looking for is a man or woman to complete this original idea and turn it into something of a screenplay