The age old question Hikaru or Magnus
None.
This was the correct answer. And before I can answer such a question I have to study every world class player ever lived. I studied a lot but not everybody. There was a guy called Emanuel Lasker. This guy was pretty good. Another guy called Tarrasch. Another guy Neumann, Charousek, Pillsbury, Aljechin, Capablanca, Keres and so on. Go over their games with Stockfish and you will see how good these guys were and how well they could calculate and how well they understood the game. What actually Stockfish cant show you.
Or Paul Morphy. This guy was a tactic monster par excellence. Then we have LaBourdonnais. This guy was good. Greco was also good. He lived in the 17th century. I have no idea who was the best. But there were many that were extremely good chess players.
Modern players have engines with which they can analyze a position in seconds where humans spend hours and days and weeks sometimes. But nevertheless for example almost everything what is written in the 100 year old book "Hypermodern Game of Chess" by Tartakower about the openings is absolutely and totally correct until today. And this book is free and I would say its better than any modern opening book you can buy for much money. But even this book is not like it should be when I want that the reader becomes perfect.
People can say whoever they pick