Harmonization, I don't know.

I while back I made my own attempt at harmonization of the resurrection accounts:

Each of the Gospel accounts report events from the perscpective of the four writers. Where one writer glosses over certain happenings, the other writers supply the details. The four Gospel accounts compliment each other, and taken together, give us a more comprehensive picture of what happened. No Gospel account directly contradicts any of the others. I made a side-by-side comparision of all four and assembled for you the followings narrative.

The guards watch dumbfounded as an angel uses an earthquake to roll away the stone that had sealed the tomb. The guards flee in terror. Mary Magdelalene, Mary mother of James, Joanna, and other unnamed women go to visit the grave. 

Matt 28:2-4 is the only Gospel account to supply details about the guards and the earthquake.
John 20:1 focuses on Mary Magdelalene to the exclusion of the other woment in the party.
Matt 28:1 also focuses on Mary Magdelaene, incidentally mentions Mary mother of James, but not the other women.
Luke 24:10 identifies Joanna as one of the women in the party.

When they arrive they see that the tomb has been opened and they see a youth sitting on the stone. The child tells them that Jesus isn't there because he had risen and that they should tell the disciples. The youth also tells them that Jesus will meet them in Galelie.Some or all of the women then enter the tomb. Two men suddenly appear. The men say, "He is not here...". The women bow to the ground in reverence. Then they go back to some the disciples reporting what the youth and the two men had said. Mary Magdalene appears to remember what was said but still believes someone carted away the body.

None of the disciples present believe the women. Mary Magdalene leads Peter and John back to the tomb so they could see for themselves..John rushes ahead but doesn't enter. He watches from the outside as Peter goes into the tomb and examines the burial wrappings. While John and Peter are examining the tomb, the two men appear to Mary again. This time Jesus is with them although she doesn't recognize him until he says her name.

Matt 28:7 records what the youth said then skips all the intervining details and goes direct to the appearence in the upper room.
Mark 16:7 also records the encounter with the youth, but omits the details of the two men. Mark also skips over Peter, John's and Mary's visit.
Luke 24:12 focuses on Peter as the central character to the exclusion of John and Mary.
John 20:8-18 adds all the details relating John and Mary Magdalene.

Meanwhile, two of the disciples, one named Cleopas, are walking to Emmas, They meet a man on the road and have dinner with him and discuss the events of the Passion. Suddenly the two disciples finally recognize the man as the risen Christ.

Mark 16 and John 20 do not record this particualar visitation.

Finally, everyone is united for dinner. Peter and John report to the rest that the tomb was empty. The two disciples returning from Emmau chime in and report their encounter with Jesus. And the reports of Mary Magdalene and the other women are fresh in their minds. Everyone is confused. The remaining disciples, including Thomas, don't believe any of it until finally Jesus appears within their midst to clear up the events of the day.

And that is how it happened...

Those who say that the four Gospel accounts conflict have not taken the time to complete the puzzle. I have done so for you, so that you may understand the story in its entirety.