Dr.William Douglass who was named the National Health Federation's Doctor of the Year.
He has left the US, and now lives in Panama City, because he found the FDA was not for the consumer, but is controlled by lobbyists for the Pharmaceutical Cartels. Amazon.com: The Health Benefits of Tobacco: A Smoker's Paradox.
Australian medical doctor and a lawyer (who practiced successfully both professions) William T. Whitby wrote in 1978 a book "Smoking is Good for You". In 1986 he updated and extended it under the title "The Smoking Scare Debunked". (scanned PDF, 6.9Mb) This one is free to read.
I read these book with an open mind and what they say is very interesting, to say the least.