Mayor Fred Jones, Sr.

Fred Jones, Sr. was a villain in Scooby Doo and the main villain of season 1 with Professor Pericles , and was the mayor of Crystal Cove and the 'surrogate' father of Fred Jr.. On the surface he seems to only care more about making money from the town's mysteries rather than solving them, which conflicts with his son, contributing to an already awkward relationship.

In reality this is a cover for a much darker and obsessed personality, one who has gone to great lengths to complete the Planispheric Disk. He forced the original Mystery Incorporated to leave Crystal Cove and bargained away the guardianship of the son of Brad Chiles and Judy Reeves.

Personality
Fred Jones, Sr. is shown to be a selfish and greedy opportunist. He will do almost anything to make Crystal Cove into a tourist hotspot. He takes any of the paranormal and bizarre events that happen in Crystal Cove as an opportunity to promote the town's popularity regardless of the consequences and thus, he will willingly turn a blind eye in favor of reaping the benefits that they bring until it is too late (Menace Of The Manticore). In turn, his relationship with his son has become turbulent at best, with Fred Jr. slowly (but surely) realizing how selfish his father really is.

However, there is some good somewhere inside him. When Fred was chasing him while he was still disguised as the Freak of Crystal Cove, a cliff Fred Jr. was standing on crumbled and Fred was clinging. Fred Jones Sr. saved his adopted son's life helping him up, allowing Fred Jr. to capture the Freak revealing Fred Sr.'s true nature. However, Fred's real parents went on to say that they didn't return to Crystal Cove, because he threatened bodily harm on Freddie. This also answers his reason for saving Freddie. He'd have no more leverage over Fred's parents if he died. In irony, him saving Freddie resulted in his outing and arrest. He lost his title as mayor to Janet Nettles.