My go to example for this is Saint Cyril. https://en.wikipedia.org/wiki/Cyril_of_Alexandria https://en.wikipedia.org/wiki/Cyril_of_Alexandria He is a canonize

My go to example for this is Saint Cyril. https://en.wikipedia.org/wiki/Cyril_of_Alexandria https://en.wikipedia.org/wiki/Cyril_of_Alexandria He is a canonized saint of Catholicism and revered as a virtuous defender of Christianity. More evidence based history instead indicates he was a narcissist primarily motivated to elevate himself politically in Alexandria which included wide spread murder and the destruction of the greatest intellectual institution the world had ever seen.