I've seen two films on him, and one with a character based on him. the one with the character based on him was Silence of the Lambs, which the character Buffalo Bill was based on him. the two that were on him, one was roughly as you pointed out TCM, and the other one was actually based on him which is called, if I remember correctly Ed Gein: The Butcher of Plainfield. In the classic Psycho the character Norman Bates was based on him as well, that one I have yet to see though.