You asked of the ECF follow current doctrine, so the Catholics here responded.
Very good Mannyfit75; Here are some writings regarding the sufficiency of scripture…
Are ya ready?
Ambrose
“For how can we adopt those things which we do not find in the holy Scriptures?” - Ambrose (On the Duties of the Clergy, 1:23:102)
“The Arians, then, say that Christ is unlike the Father; we deny it. Nay, indeed, we shrink in dread from the word. Nevertheless I would not that your sacred Majesty should trust to argument and our disputation. Let us enquire of the Scriptures, of apostles, of prophets, of Christ. In a word, let us enquire of the Father…So, indeed, following the guidance of the Scriptures, our fathers [at the Council of Nicaea] declared, holding, moreover, that impious doctrines should be included in the record of their decrees, in order that the unbelief of Arius should discover itself, and not, as it were, mask itself with dye or face-paint.” - Ambrose (Exposition of the Christian Faith, 1:6:43, 1:18:119)
Augustine
“In order to leave room for such profitable discussions of difficult questions, there is a distinct boundary line separating all productions subsequent to apostolic times from the authoritative canonical books of the Old and New Testaments. The authority of these books has come down to us from the apostles through the successions of bishops and the extension of the Church, and, from a position of lofty supremacy, claims the submission of every faithful and pious mind…In the innumerable books that have been written latterly we may sometimes find the same truth as in Scripture, but there is not the same authority. Scripture has a sacredness peculiar to itself.” - Augustine (Reply to Faustus the Manichaean, 11:5)
“Every sickness of the soul hath in Scripture its proper remedy.” - Augustine (Expositions on the Psalms, 37:2)
Clement of Alexandria
“But those who are ready to toil in the most excellent pursuits, will not desist from the search after truth, till they get the demonstration from the Scriptures themselves.” - Clement of Alexandria (The Stromata, 7:16)
Cyprian
“Let nothing be innovated, says he, nothing maintained, except what has been handed down. Whence is that tradition? Whether does it descend from the authority of the Lord and of the Gospel, or does it come from the commands and the epistles of the apostles? For that those things which are written must be done, God witnesses and admonishes, saying to Joshua the son of Nun: ‘The book of this law shall not depart out of thy mouth; but thou shalt meditate in it day and night, that thou mayest observe to do according to all that is written therein.’ Also the Lord, sending His apostles, commands that the nations should be baptized, and taught to observe all things which He commanded. If, therefore, it is either prescribed in the Gospel, or contained in the epistles or Acts of the Apostles, that those who come from any heresy should not be baptized, but only hands laid upon them to repentance, let this divine and holy tradition be observed.” - Cyprian (Letter 73:2)
Cyril of Jerusalem
“For concerning the divine and holy mysteries of the Faith, not even a casual statement must be delivered without the Holy Scriptures; nor must we be drawn aside by mere plausibility and artifices of speech. Even to me, who tell thee these things, give not absolute credence, unless thou receive the proof of the things which I announce from the Divine Scriptures. For this salvation which we believe depends not on ingenious reasoning, but on demonstration of the Holy Scriptures.” - Cyril of Jerusalem (Catechetical Lectures, 4:17)
Jerome
“When, then, anything in my little work seems to you harsh, have regard not to my words, but to the Scripture, whence they are taken.” - Jerome (Letter 48:20)
“I beg of you, my dear brother, to live among these books [scripture], to meditate upon them, to know nothing else, to seek nothing else.” - Jerome (Letter 53:10)
“When Paula comes to be a little older and to increase like her Spouse in wisdom and stature and in favour with God and man, let her go with her parents to the temple of her true Father but let her not come out of the temple with them. Let them seek her upon the world’s highway amid the crowds and the throng of their kinsfolk, and let them find her nowhere but in the shrine of the scriptures” - Jerome (Letter 107:7)
That should get the wheels spinning.