He probably won't work very well as an SCP, but here's a character I created last year. He's not really meant for horror, but more of a series. Still, I'll throw him at the public and see what we can do.
He's a tall, pale man in a labcoat. He has brown hair and darkly circled eyes, and has long arms and legs. He wields a giant meat cleaver and the anomalous ability to lock up any living object's joints.
Anyway, let's see what we can do.