The title of this article is a conjectural. Though the topic is found within The Simpsons universe, a proper name is not available.

No, no! Not me, friends! He's talking about himself. But thanks for looking!
―Happiest man

The Happiest Man in Springfield is the happiest man in Springfield, hence the name. Ned refers to himself as the happiest man, but the townsfolk think he's referring to this gentleman.