One by the co-inventor of corn flakes. Read more at Wikipedia.
John Harvey Kellogg, M.D. (February 26, 1852 – December 14, 1943) was an American medical doctor, nutritionist, inventor, health activist, and businessman. He was the director of the Battle Creek Sanitarium in Battle Creek, Michigan. The sanitarium combined aspects of a European spa, a hydrotherapy institution, a hospital and a high-class hotel. Kellogg treated both the rich and famous and the poor who could not go to other hospitals. Disagreements with other members of the Seventh-Day Adventist Church led to a major schism within the sect: Kellogg was “disfellowshipped” in 1907, but continued to follow many Adventist beliefs and directed the sanitarium until his death in 1943. Kellogg also helped to establish the American Medical Missionary College. The College, founded in 1895, operated until 1910 when it merged with Illinois State University.
Kellogg was outspoken on his beliefs on race and segregation, though he himself raised several black foster children. In 1906, together with Irving Fisher and Charles Davenport, Kellogg founded the Race Betterment Foundation, which became a major center of the new eugenics movement in America. Kellogg was in favor of racial segregation and believed that immigrants and non-whites would damage the gene pool.
Kellogg was also anti-sex, particularly anti-masturbation. His Wikipedia entry is long and is one of the most interesting ones.