I know you have decided (long ago) that scripture is the only and final authority in matters of the Christian faith. I believe that bible makes it clear that the Church is the final authority. But years ago (on this forum) Carson Weber was discussing 'sola-scriptura' and put forth some ideas which conflicted with what I had always been taught as a Baptist.
In Matthew 18:15-18 we see Christ instructing His disciples on how to correct a fellow believer. It is extremely telling in this instance that Our Lord identifies the Church rather than Scripture as the final authority to be appealed to. He Himself says that if an offending brother "will not hear the Church, let him be to thee as the heathen and publican" Matthew 18:17 – that is, as an outsider who is lost. Moreover, Our Lord then solemnly re-emphasizes the Church’s infallible teaching authority in verse 18 by repeating His earlier statement about the power to bind and loose Matthew 16:18-19, directing it this time to the Apostles as a group rather than just to Peter: "Amen I say to you, whatsoever you shall bind upon earth, shall be bound also in heaven; and whatsoever you shall loose upon earth, shall be loosed also in heaven." Matthew 18:18
Of course there are instances in the Bible where Our Lord does appeal to Scripture, but in these cases He, as one having authority, was teaching the Scriptures; He was not allowing the Scriptures to teach themselves,as I believe you were asserting in this post. For example, He would respond to the Scribes and the Pharisees by using Scripture precisely because they often tried to trip Him up by using Scripture. In these instances, Our Lord often demonstrates how the Scribes and Pharisees had wrong interpretations, and hence He corrects them by properly interpreting Scripture.