I beleive that the gospels are a FAIRLY accurate source of Jesus, in the bible, the 4 gospels in order are Matthew Mark Luke and John, but through close examination, we are able to insinuate that Mark was actually the first source, this is because the works of Jesus and his teachings within Mark are carried out through Matthew and Luke pretty much the same. In theory, Matthew and Luke had a new source which scholars beleive to be the 'lost source' popularly called source 'Q' (I dont know why lol) thats why Mark is the shortest of Gospels, and has more simplistic grammer with the continuous use of 'and' to continue on a story. If you examine Luke and Matthew, they are rich in grammer and have seperate stories as well as different eye witness accounts. Sure, there may be a lot of differences and contridictions within the 2 books, and perhaps the book of Mark as well. This is because when Jesus asscended into Heaven, many thought he would appear again, in what they called 'Parousia' meaning second coming. With the mentality that Jesus would re appear once again, many thought that there was no need to write down his life in documents, plus hiring scribes I imagine would have been very expensive. So stories were told through word of mouth. After about 100-200 years after the death of Jesus, people began to document his life because the parousia had not occured as they expected. The books were not written close to each other through time, Mark is estimated to have been written roughly 70-90 years before Matthew and Luke, and Matthew and Luke is beleived to be have written by authors relativley close in time to each other, about 10 years roughly.
Each author is writing to a different type of audience. Matthew wrote for the messianic Jews. Luke wrote for a Gentile and Non Jewish Christian Audience. Mark is beleived to be aimed at a Judeo-Christian audience.
Mark concentrated more on Jesus' Humanity and Divinity. Matthew concentrated on Jesus' Royalty through a jewish Lineage and Bloodline, tracing his roots back to King David. Luke portrayed Jesus coming for everyone both Jews and Non Jews alike.
Now, The elevation of Jesus Christ through the Bible is evident and can be traced back to the Old Testament. He is prophecised in the prophetic books-
Micah 5:1-2 (NIV) Marshal your troops, O city of troops, for a siege is laid against us. They will strike Israel's ruler on the cheek with a rod. 2 "But you, Bethlehem Ephrathah, though you are small among the clans of Judah, out of you will come for me one who will be ruler over Israel, whose origins are from of old, from ancient times."
Deuteronomy 18:18 (NIV) I will raise up for them a prophet like you from among their brothers; I will put my words in his mouth, and he will tell them everything I command him.
Acts 3:20-22 (NIV) and that he may send the Christ, who has been appointed for you--even Jesus. 21 He must remain in heaven until the time comes for God to restore everything, as he promised long ago through his holy prophets. 22 For Moses said, 'The Lord your God will raise up for you a prophet like me from among your own people; you must listen to everything he tells you.
etc etc and I beleive he is elevated within the first three gospels in their own approach.
The book of John however has a Jesus preaching the Logos (The Word) there is no birth of Jesus, nor information on his past life. After the prologue it concentrates on Jesus' Ministry. Jesus is the same person in all 4 Gospels, but the Ethos and Theological emphasis differ.
Christology is made evident within John, and he describes Jesus as the Logos - The Word.. which parallels the book of Genesis and John's Prologue 1:1
Genesis
In the Beginning God created the Heavens and Earth
John
In the beginning there was the Word and the Word was with God
In this context it is clear that Jesus is elevated. Through the Prophets Jesus is made eveident to cause an impact within his time. Over the years there have been different interpretations on Jesus, but his humble and loving qualties stay the same. There are arguments of whether he claimed Divinity, but one cant argue that Jesus has made a huge impact within our lives regardless of religion.