Check out this guy: https://stackoverflow.com/users/504952/carlo-bos His only activity ever, is answering a single question, which has net him almost 2500 points.
The One Hit Wonder could be, answered a question with over 100 points, with no other answers over 3 points.
Also note the he decided to post his answer a year after Jon Skeet. Which maybe is a new badge suggestion by its self, "Smarter Than Jon Skeet".