Oliver the humanzee

Oliver is a chimpanzee born in 1958 who does things that other chimps don't: he walks upright all the time, looks kinda like a cross between a human and a chimpanzee, and tries to mate with female humans. He was introduced to the world in 1976 and people had been making money off him for decades, until he finally found his happy place in a sanctuary outside San Antonio, TX. Even with years of medical research and overreacting idiots who wanted to show that there was a "missing link" (which makes no scientific sense), Oliver was proven to be a chimp. Just a really cool chimp.

Here's a documentary on him. I haven't watched it yet so I can't give it my seal of approval.