Many Characters from the Simpsons have made one-time appearances, but Many need to appear again. The list spreads looooooooooooooooooooooooooong, loooooooooooooooooooooooooooooong and looooooooooooooooooooooooooooooooooooooooooooooooooooonger. In this list we all Narrow it down, and only the truly best characters can win them all who have made questions unanswered
You are welcome to add more, and feel free to make ANY change you like, even copy and pasting
Simpsons One-Time Characters Who Need to Appear Again! VOTE!,
Hank Scorpio
Episode: You Only Move Twice (Season 8, 1996)
Hank Scorpio (Albert Brooks) is an evil genius. He is also the cheerful, friendly owner of Globex Corporation. Scorpio is considered by some to be Albert Brooks' best voice performance on The Simpsons and for this and four other guest performances he was named the greatest guest star in the show's history by IGN. Brooks ad-libbed many of his lines. Homer and his family never knew that Scorpio is an international criminal and they will never know about it. His name is a reference to Frank Serpico. He also appeared once in Simpsons Comics #117, "Sandwiches Are Forever", as well as Simpsons Comics #132,
Don Brodka
Episode: Marge Be Not Proud (Season 7, 1995)
Don Brodka (Lawrence Tierney), chief of security at the local Try-N-Save store. Bans Bart for life from the store after Bart is caught shoplifting the Bonestorm video game.
Hugo Simpson
Ronaldo
Episode: Blame it on Lisa (Season 13 ,2002)
Ronaldo (Tress MacNeille), a Brazilian orphan whom Lisa sponsors.
Tom
Episode: Brother From The Same Planet. Tom (Phil Hartman)
Donny
Episode: The Debarted (Season 19, 2008)
Donny (Topher Grace) is a new kid at school hired by Principal Skinner and Superintendent Chalmers to rat Bart out whenever he plays a prank at school. He resembles Topher Grace.
Lugash
Hugo Simpson
Guy Incognito
Titania