Andrew

Andrew was Peter's brother and the first disciple Jesus called — John 1 has him following Jesus first and then going to fetch Peter. After that he disappears from the New Testament narrative. Tradition says he preached in Scythia, Greece, and around the Black Sea, and was crucified at Patras on an X-shaped cross (which is where the Scottish flag comes from — he's the patron saint of Scotland, Russia, and Greece). The historical evidence is thin and mostly later. But the pattern is real: he's the apostle of the bring-someone-else model. He always shows up bringing somebody to Jesus.