Some who preached the gospel or were instrumental in conversion, and who definitely were not part of the Twelve or the Seventy:
Philip (Acts 8): Preached in Samaria and baptized the Ethiopian eunuch.
Those who were scattered (Acts 8:1–4): Ordinary believers “preached the word wherever they went.”
Ananias (Acts 9): A “disciple in Damascus,” instrumental in Saul’s conversion.
Men from Cyprus and Cyrene (Acts 11:20–21): Preached successfully in Antioch; started what became Paul’s home church.
Barnabas (Acts 4, 9, 11, 13): A key teacher and missionary, yet not one of the Twelve or the Seventy.
Priscilla and Aquila (Acts 18): A married couple who taught Apollos and strengthened the early church.
Apollos (Acts 18): A powerful preacher not tied to the apostolic circle.
The Samaritan woman (John 4): One of the earliest proclaimers of Jesus; certainly not part of any recognized ministry structure.