Arius was considered heretic, too. "Official doctrine" does not = theology, as it was accepted, obviously since the 2nd century, over 100 years before Nicea.
From Wikipedia:
"
Arius (
AD ca.
250 or
256 -
336) was a
Christian priest in
Alexandria, Egypt in the early fourth century. In about the year 318, he was involved in a dispute with his bishop,
Alexander of Alexandria, maintaining against him that the
Son of God was not
consubstantial or coeternal with
God the Father, but that there was once a time, before he was begotten, that he did not exist. Arius, with a following of other priests, was excommunicated, but debate continued throughout the
Eastern Roman Empire. Many bishops, particularly those who studied under
Lucian of Antioch, agreed with Arius. By the time
Constantine took over the East in 324, debate was fierce, with various councils condemning and approving Arius's views on the Son.[
citation needed]
Constantine summoned the
Council of Nicaea in 325. The Council condemned Ariuss teaching, exiling him. Arius was recalled within a few years, and seems to have spent the rest of his life trying to be readmitted to communion in Alexandria;
Athanasius seems to have frustrated his efforts. Just as Arius was to be readmitted to communion in Constantinople in 336, he is said to have died suddenly. Several scholarly studies suggest that Arius was poisoned by his opponents.
[1]
The controversy was far from over, and would not be settled for decades to come (continuing later into the West as well). Those who agreed that the Son was not
consubstantial were already at that time being labeled Arians, especially by
Athanasius of Alexandria, and the name
Arianism remains the descriptor of this teaching. The naming is incidental, as Arius role was only to ignite the controversy. The issue of the Sons relationship to the Father had been discussed before in church history, only never so fervently and universally. Other Arians like
Eusebius of Nicomedia and
Eusebius of Caesarea were much more influential. In fact, some later "Arians" disavowed the name, claiming not to have been familiar with Arius. Nonetheless, Arius' (and his bishop's) stubborn insistence had brought the issue to the theological forefront, and so it is labeled as his."
Regards,
Scott