'To all,
The list I referenced above can be reviewed by anyone by going to Amazon and viewing the free sample of Fischer: Move by Move. The fact that different FMs, GM, and IMs have different assessments of Paul Morphy is no surprise. However, the fact remains that of number of them considered Paul Morphy worthy of being considered when discussing who was / is the greates player of all time.
Also one world champion consider Morphy the greatest open game player of all time.
I will ask my question again: Who of the active top players if they were born during the 1800 and only had access to the same knowledge and tools as Paul could of beat him in the open game?
No, fact is rather that the list is fabricated, because no GMs and IMs in their right minds would come to results like that. That is obvious to anyone who studied chess seriously, take it or leave it.
And your question about modern top players born in the 19th century is completely speculative. But from a statistical point of view, it is of course highly likely that many current top players would have been better than Morphy. Because today there are thousands of serious tournament players, while back then it was a handful.
I will ask my question again: Who of the active top players if they were born during the 1800 and only had access to the same knowledge and tools as Paul could of beat him in the open game?
IMO, Morphy would be a terror to face for most of today's masters, had they been born in his era.
Most players don't reach 2200+ without a lot of effort, practice, and study. A lot of losing, learning, and rising through the ranks. These days, it's done it with the help of modern theory, instructional books, and engines, too.
As far as history (or perhaps legend) has it, Morphy didn't need any of that. He would probably have considered such devotion to chess a huge waste of time, even.
For him, it was seemingly simple: just glance at the board and play strong chess.
Who needs engines or books, or databases to review, when you can simply play masterful chess through intuition alone? :P