I have found the current WikiTree policy that only four major headings -- Biography, Research Notes, Sources and Acknowledgements -- are allowed on a profile to be quite helpful for profiles such as this.
My objective with pre-1500 profiles I work on is to put only well documented facts under Biography. Everything else goes under Research notes. This profile is a good example of someone who quite possibly only existed in legend. That doesn't mean he never existed, only that contemporary documents testifying to his existence don't seem to exist. He may have existed, but the facts associated with him may have been amplified, the relationships confused, and the dates -- in the time he lived they didn't really use dates as we know them. So it is not a problem that "experts differ." It would be a miracle if experts did not differ.
While under ==Biography==, I believe facts are best arranged in chronological order, ==Research Notes== lends itself to discussing the sources -- the different legendary narratives, starting with the earliest, and to see how the legend developed. That way one isn't choosing among the various discordant facts, although identifying which ones are in the earliest legend does give the earliest ones a bit more likelihood of actually being true.