I'm not sure if it's ever firmly established who "made" the four chimeras Darius, Heinkel, Jerso, and Zampano. All four were in the Amestrian military, but since they were assigned to Kimblee and Kimblee was presumably released by Bradley, and since they seem to be "perfect" human chimeras like Greed had, I think they were made by Father and not the Amestrian military. Of course, at a high enough level, there's not really much difference. But I think Father made all the successful chimeras.