Uzziah

2 Chronicles 26 talks about King Uzziah's reign. This is the same Uzziah that Isaiah refers to in Isaiah 6, I believe.

5 He (Uzziah) sought God during the days of Zechariah, who instructed him in the fear of God. As long as he sought the LORD, God gave him success.
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16 But after Uzziah became powerful, his pride led to his downfall.

He decided he wanted to burn incense in the temple, which apparently he was not permitted to do, even though he was the King. Which he probably thought, because he was the King, he could do what he liked. But it was pride. The priests who went to tell him it was wrong, he 'raged' at. He likely KNEW it was wrong, and knew they were right, thus the eruption in rage. He was struck with leprosy. The priests hurried away. 20...Indeed, he himself was eager to leave... Indeed.