Alonzo Clemons-- Called a "prodigious savant," he sculpts animals with incredibly realistic proportions with only a limited time looking the subjects.
Steven Wiltshire-- Often called "The Human Camera," this autistic artist can draw entire cities by memory with scary precision.
Both of these men deserve a unique post. However, if I started, I wouldn't know where to end. Please leave a comment on this post if you have a reaction.