George Washington
Robert Taft
Joseph McCarthy
George Washington presided over the greatest compromise in our nation's history in moving from the Confederation to the Constitution. He had his principles, but was unafraid of compromise.
Robert Taft was extremely involved in labor issues and I doubt you would claim the Taft-Hartley Act did not demand compromise.
Joseph McCarthy had no need to compromise as his notoriety came from a very narrow charge-weeding out communists from within the government. As effective as he was at that particular effort, I doubt many would have considered him a credible presidential candidate.