I will say, with the risk of being rebuked by the experts, that Jagr is the best player of all time. He's certainly my favorite.
IDK, even if you adjust for how competitive and focused Jagrs era was, Gretzky, Lemieux, and Orr will still come out on top.
IMO even if you teleport prime Gretzky to 2019, his stickhandling and passing abilities are still the best in the league for 2019. He would need to increase his jump a lot to handle the modern games speed, but his era wasnt that slow that he couldnt adapt.
I feel like the point where most players become comparable in absolute all time terms is somewhere in the middle to late O6 Era. A guy like Howie Morenz was impressive, and has definitely earned his legacy when you factor in how significant he was for his era but I cant imagine him being a star in 2019 NHL based on just his skating abilities. A guy like Tony Esposito though? I could easily see him being an NHL starter given time to adjust to the current era for equipment, rules, styles, etc.