As I was listening to a debate between Drs. William Lane Craig and Richard Carrier on the historicity of Jesus' resurrection, something Dr. Carrier said caught my attention. He claimed that "[Paul] is alone, actually; there's no other enemies of the church that were converted to join the church." I immediately got a hunch that this was unlikely, but I haven't had any luck in finding other antagonists to the early church who were converted.
Based on the New Testament and contemporary (within the 1-200 AD "Early Church" period) historical records, were there any other enemies of the church, aside from Paul, who converted to Christianity?
For reference, the debate can be found here, and the point containing the quote starts at 1:28:32.
I would greatly appreciate citations in any answers that you might offer.
To further clarify: I'm not looking for answers from sources that Dr. Carrier would necessarily accept as credible (although citations from extra-biblical, historical sources are definitely encouraged). To place a constraint like that on the question might make it impossible to answer, as he states in the video that he doesn't view the gospels as credible. I would certainly accept answers that reference the gospels.
Also, for the purposes of this question, I would define an "enemy of the church" during the apostolic time period as someone who actively persecutes or opposes Jesus, the apostles, and the early Christian churches.