H. P. Lovecraft
He wrote many scary short stories. These often were about odd creatures that Lovecraft made up by himself or with his friends, including August Derleth, who wrote mysteries. The creatures did not really care about human people at all, so they were not out to hurt people, but if they did, they did not care. They looked at us like we would be ants. Their behaviour, attitude and look also tended to make people go crazy.