Penrod Stillwall

Penrod Stillwall is a descendent of Jefferson Stillwall and created the Headless Specter to scare people away because he was afraid someone would steal his family's treasure.

When Mystery Inc. learned of this, Fred and Shaggy ended up luring out the Phony Phantom responsible, trapping it under a pillar. It was discovered to be Penrod's greedy neighbor Asa Shanks who was after the treasure.

Appearances
Scooby-Doo, Where Are You! - Haunted House Hang-Up

Trivia
Penrod was one of the first people to use a monster disguise for a noble reason, rather then a criminal one. This would be repeated by others including Velma Dinkley herself.