What on earth is a pure Hanbali? Perhaps you mean someone who blindly follows the madhab even when it conflicts with Quran and Hadith? If that is your intention, then in fact Imam Muhammad b. Abdul Wahhab was not a pure Hanbali, for he said: "If a person is learning fiqh from one of the four madhhabs, then he sees a hadeeth that opposes his madhhab; and so he follows it and leaves his madhhab - then this is recommended, rather it is obligatory upon him when the proof has been made clear to him." (Ad-Durur-Saniyyah (4/7))