Have you heared of Dick Williams ?
Famous for the animation work of “Who Framed Roger Rabbit”, he is also responsible for a cartoon called the “The Thief And The Cobbler”. It is an unachieved masterpiece, which highly “inspired” Disney when doing their “Alladin”.

You might be able to find the whole movie, including unachieved scenes, sketches and tests.
Below is his take on “Raggedy Ann and Andy”.