St. Anthony the Great certainly was a prophet.
Coptic Christian? Russian Orthodox?
Anthony (Feast Day January 17 for Catholics and Orthodox alike) came to the Faith in Egypt during the 4th Century so he was almost certainly a spiritual descendant of St. Mark so of the same lineage as today’s Coptic Orthodox...of course back then the Patriarchates were still in the process of forming and the Great Schism had not occurred.