MRA: It's always hard to pick one, so I'll give a shout out to two people. I was intrigued by Madame Marcia Champney, who was an astrologer and clairvoyant and said she was consulted by First Lady Florence Harding during the Harding administration. She also tangled with Houdini at the congressional hearings on fortune telling in the 1920s. The other person is Rose Mackenberg, who was an investigator who joined Houdini in his quest to investigate, and often debunk, mediums who they thought were preying on grieving people. She testified in the hearings mentioned above.