Dan Barker, many years ago issues a challenge to Christians to take the 4 gospels and build a reasonable narrative of them. Presumably, he feels it is difficult, when in fact, the 4 gospels harmonize nicely without adding any commentary at all.
The conditions of the challenge are simple and reasonable. In each of the four Gospels, begin at Easter morning and read to the end of the book: Matthew 28, Mark 16, Luke 24, and John 20-21. Also read Acts 1:3-12 and Paul's tiny version of the story in I Corinthians 15:3-8. These 165 verses can be read in a few moments. Then, without omitting a single detail from these separate accounts, write a simple, chronological narrative of the events between the resurrection and the ascension: what happened first, second, and so on; who said what, when; and where these things happened. ...His premise is that the gospels contradict and cannot be reconciled.