Is it Pastor, or Elder....or.....Overseer?

When most think of church, they think Pastor as the primary leadership and covering of the people. Such an important role should have a guide, like deacons, elders, and overseers have in various letters from Paul to Timothy or Titus. Yet, when we search, there is only one mentioning of Pastor in the New Testament, found in the book of Ephesians. We see in the book of Acts, 1 Timothy, and Titus how important decisions and leadership appointment went to the Elders and Overseers. I want to explore the possibility that Pastors are Elders and Overseers.