St. Irenaeus of Lyons/Lyon (France – back then it was Colonia Copia Claudia Augusta Lugdunum in Gaul) was a bishop sent to Gaul from Asia Minor, right after the previous bishop and a lot of the flock got martyred in the arena. Irenaeus was a disciple of St. Polycarp, who was a disciple of the Apostles.
He is one of -the- Fathers of the Church, and also is called an “Apostolic Father,” because he was a disciple of an Apostle’s disciple.
St. Ignatius was also a disciple of an Apostle’s disciple, or close to it, and he was a contemporary of St. Polycarp. And an Apostolic Father and Church Father.
And yup, Tertullian was great until he lost it. But there are some danger signals along the way. Still, he was a good teacher and had a sense of humor (until he lost that, too). He wrote a large chunk of essay about how impractical the traditional Roman formalwear was, and how much he hated shoes, boots, and togas. He had to wear all that stuff to practice law in the courts.