I've only read up to 547 along with all the references and stories but my favorites would be: Iris(105), Eye Pods (131), The RPG Game (245), God (343), A Gift from Dad (348), clockworks (914) and The Wondertainment dudes
Under no circumstances is SCP-447 to be allowed to come into contact with dead bodies. http://www.scp-wiki.net/scp-447