IAn example of Gospel harmony or Chronological gospels in one is from Andre Dellerba "HOLY GOSPELS IN ONE 2018 by Andre Dellerba"
"The unique colour coding enables cross referencing of each word or phrase from Matthew (Blue), Mark (Green), Luke (Red) and John (Purple). If there is a common sentence in the Gospels then that sentence which is most complete is used. If another Gospel has a word or phrase which is unique, then that word or phrase is added to that sentence. For example, Luke 23:25b; John 19:16; Matthew 27:31; and Mark 15:20: "
In my translation are the topic-titles the same if the event is the same: But keep in your mind that there are similar events: Sermon on the Mount by Matthew Vs Sermon on the Plain (plateau) by Luke First cleansing of the Temple in John 2 Vs Cleansing of the Temple by the other Gospels
There is also harmony from Galvin for e-Sword PC
Using your example of the blind beggar (Mat 20:29-34 Mark 10:46-52 Luke 18:35-43) How do you think that you can synchronise it into one text?