We don't even know how much the legend changed from its uncertain origins to the time of the earliest surviving ballads.
There's more than a little guesswork and wishful thinking behind any identification of a "real Robin Hood".
There wasn’t however a character that didn’t fit in the story and all worked well together.
There were a couple of things that grated slightly.
The search for a real Robin Hood continues, and if you search about the web, you'll find others who have combed through the historical records to find even more possible Robins.