Jeeves

Jeeves is the butler at Mindy's Mansion, a figment of Homer's imagination.

History
Colonel Klink takes Homer to the residence after he is knocked out. Homer sees his future self if he were to leave Marge and marry Mindy. He sees himself and Mindy happily playing tennis. He even has a butler named Jeeves. He is then taken to the White House, it is implied Marge would become president if Homer left her.