Who was a worker and a powerful leader in corinthian and ephesian churches

Paul of Tarsis is the correct answer.

Paul of Tarsis, also known as Saul of Tarsis, was a preacher and powerful leader who preached the gospel of Jesus Christ to the first-century world. In the journey of spreading the gospel, Paul (along with Priscilla and Aquila) was the one in charge of a mission that was paramount for building up the churches of Corinth and Ephesus. Even though Paul was a great Apostle, Apollos was a powerful leader in Corinthian and Ephesian churches. He traveled to Ephesus where he preached in the synagogues (Acts 18.24) and also to Corinthian where he had the chance to "water" what Paul had "sown" (Acts 19.1).