Harry Potter.
The greatest man in the world, the most powerful wizard in the wizarding world, some say he has touched the realm of God.
His life is legendary.
When he was seventeen, he killed Voldemort, ending the era of war, and he was known as the savior at the time. Later, he resolutely assumed the responsibility of a leader in the chaotic era after the war. Taking advantage of the chaos and decline of the nobility, he combined the technology and magic of the Muggle world to create a new wizarding era, and the wizarding world took off.
He also changed people's understanding of black magic, proposed the concept of elemental magic, fundamentally analyzed the magic system, and changed the magic learning that had not changed for thousands of years.
Now, people call him "the Holy One".
The author has a good heart. If you don't like the setting, you can tell me. Pay attention to your words and I will try to change it.