The evangelists are those who proclaims the good news, either by preaching or writing.
Evangelists are part of the five-fold ministry, along with pastors, teachers, prophets and apostles.
Evangelism is our first concern in the world and that is to bring the gospel of Jesus Christ to the lost. We are to prepare ourselves to be worthy to meet Jesus when He comes for His Bride, then we will be able to lift Him up and draw all men unto Him. There were originally evangelists or preachers who, without being fixed to any church, preached wherever they were led by the Holy Spirit, like missionaries. Such were Philip and Timothy and others, gospel writers which bring to all men the glad tidings of eternal salvation. In a general sense an evangelist is anyone who proclaims the mercy and grace of God, especially as unfolded in the gospel.