Hugo Strange (The Batman)

History
Dr. Hugo Strange ran Arkham Asylum until it was found out that he was crazy. He was then thrown into the Asylum himself. On many occasions he tried to study Batman but none succeeded. He invented a machine that allowed you to go into a person's mind and went into Joker's and that was what sparked his intrest in Batman.

In Gotham's Ultimate Criminal Mastermind, Dr. Strange invented D.A.V.E. to study Batman and was foiled and sent to Arkham.

He also tried messing with Batman's head using a serum that drove Batman crazy. But Batman overcame it.

Strange was one of Rumor's victims.