Bob Ross
Believe it or not, soft-spoken king of calm Bob Ross was only a painter during the later years of his life. He was a military man in his youth, spending 20 years serving in the United States Air Force. It was while in the Air Force that Ross took a few art classes, and when he retired from military service at age 39, he began studying painting in earnest. Years later, he earned his own television series for his efforts.