William Jennings Bryan
William Jennings Bryan was a three-time presidential candidate on the Democratic Party ticket (in 1896, 1900, and 1908). He ran on a platform of opposition to railroads, banks, and the gold standard, first rising to prominence on the basis of a speech[wp] made against the latter and in favor of bimetallism.
Later, he supported Prohibition and opposed the theory of evolution. In an illustrative example of the level of brain activity among creationists, he expressed his opposition to evolution using talking points that are still in wide use today: that evolution undermined the Bible and that it gave rise to Social Darwinism and eugenics. He was also a socialist.
He was the prosecuting attorney in the Scopes trial; in this capacity he was called to the stand for a questioning by Clarence Darrow, the defense attorney, in which (not having the aid of present-day bullshitting techniques such as the Gish Gallop) he was thoroughly trounced and humiliated. He won the case, but died five days later due partially to the fatigue it had brought upon him.
The fundamentalist Bryan College in Dayton, Tennessee, which was founded in the aftermath of the Scopes trial, is named for him, as well as a middle and high school in Nebraska, where he spent most of his political career and is mostly known for his "Cross of Gold" speech and multiple presidential runs.
While viewed as a martyr by fundamentalists, William Jennings Bryan would be considered liberal by most of them if he were around. For instance, he was a day-age creationist, not an outright young earth creationist. He supported downright un-American things like favorable legislation for poor workers and ardent pacifism, even resigning from his post as Secretary of State when it became clear the United States would enter World War I. He also supported extending suffrage to women. It isn't clear if he would support the many of the things religious conservatives have rallied for in recent decades, either.