That's the way I see it. Gretzkty is Gretzky.
McDavid could bump Lemiuex. . . but the mystique around Lemieux is hard to beat. Coming back from cancer after retiring for years and still being far and away the best player in the league . . . that kinda thing is hard to trump without having set every record imaginable like Gretzky.
If McDavid can win a couple championships and play till he's 40 at an insanely high level . . . he could bump Lemieux down. But I think he ends his career at the bottom end of the top 5.
He'll be higher than Sakic, Yzerman, Crosby, Ovechkin and all those guys though. He's clearly better than all of them.