My religious superhero is the apostle Paul. There are three reasons for this.
First, Paul was a man of conviction. Whatever he did, he did with zeal. For instance, when he was a Pharisee, he was all in. He even persecuted the early church. When he became a Christian, again, he was all in. This passion is admirable.
Second, Paul was a great intellectual. He wrote most of the books in the New Testament. Moreover, people still read his letters! They are timeless, and I would argue that his writings have shaped humanity more than any other words.
Third, he was a man of action. He went on many missionary journeys and never grew faint in his mission.