No, somebody does not. The reasoning for that is people no longer look to a singular identity, but rather an idea. This isn't the 60s & 70s anymore, where they needed Martin Luthers, or Malcom X's.

...is that we already have a cartoon bear which enjoys wide popularity.

Or if you're feeling sarcastic, that Dr. King still called for sweeping change and radical equality. I'd go with mentioning the bear, though.