what do we do to the text to read perfection in between the lines?
(list of those in Tanach who, despite what seems to be written to the contrary, did not sin. discussed on this page are sons of Samuel, David, Solomon, and Josiah. the contortions of interpretation so do not have to accept the contorted and blemishes of these characters.
but Josiah is also called a perfect penitent, he did sin but his repentance was fully accepted. like Okvan aka Natan, who is described as sparks emerging from his head, and embraced by angels. for english translation of the full talmud page, see here)