John Huss was a rector of the Czech university. He exposed the cunning brutality of the church. John Huss (a.k.a. Jan Hus) is regarded to be one of the earliest known religious thinkers and reformers in the world. Condemning Hus' uprising, the Church first excommunicated him and then burned him to death, in an unfair trial.
Oliver Cromwell-- hero to the English, much reviled to this day by the Irish. Oliver Cromwell came to Ireland for a 9 month campaign [1649 – 1650]. Brief as the campaign was, he earned a particularly notorious reputation among Catholics as a result of his ruthless military campaign.