Graybeard
April 1946 (?), "Captain Marvel Jr." #37. In 1846, a man is sent to prison for a 99 year sentence. While there, he reads and studies every book on crime as well as exercising and keeping his body in tip top shape so that a century later, he is released from prison having served his entire term. Armed with a sword cane and having a long bushy graybeard he takes over a gang and puts his prison education to work. His crime wave brings him to the attention of Captain Marvel Jr, but even Junior has trouble outsmarting the old crime lord. In fact, at the end of #37, the Graybeard was still on the loose.
Read more about this topic: List Of Marvel Family Enemies