That is how it works with with the four gospels. We don’t need to try and make them fit together. The harmony is already there. We just need to discover how the Holy Spirit has already harmonized the four writings and then preach it that way.
All scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness: That the man of God may be perfect, thoroughly furnished unto all good works. 2nd Timothy 3:16-17
In the coming months (possibly years), I will attempt to show the harmony of the four gospel accounts not create a harmony. If the Holy Spirit breathed these words to men, then He is the ultimate author and His words are already in harmony.