| Great Grandpa Willikers
Great Grandpa Willikers was the great-grandfather of Jamison P. Willikers (and possibly of Shaggy Rogers as well, since they are cousins).
He was a elderly Caucasian male with white hair.
He was angry at the family for all being farmers instead of great airmen.
Scooby-Doo! (DC Comics)
Jamison thought his ghost might be the Barnstorming Banshee, since he was angry at the family for all being farmers. He wanted a family of great airmen instead. (Barnstormin' Banshee)