Not really, no. From 1984 to 1990, Lemieux didn't miss significant games and he was 100 miles and about 25 trophies behind Gretzky. That distance was never going to be bridged.
Also, Lemieux in his age 24 season (1989-90) had a noticeable scoring decline from the previous season, relative to peers, something that didn't happen to Gretzky until he was 28. Admittedly, based on a very small sample, this decline from Lemieux's peak continued through the 1990-91 season, and arguably even 1991-92. (Of course, you will this attribute this to his injuries.)
In any case, Lemieux in good health was nowhere near Gretzky at any comparable stage during the first six years of his career. And by 1995-96 Lemieux was being outscored at even strength by two teammates, while Gretzky at age 30 was still destroying the rest of the League as an even strength scorer.
There is also a massive gulf between the two players in international hockey contribution and performance.
You're HFBoard's biggest Gretzky partisan and if someone implies anywhere that there could be any doubt about Gretzky being the greatest there must be some kind of bat signal going up in the sky to alert you. If Gretzky had played 15 games he'd be number one for you, so your stance doesn't surprise me one bit.
But the reality of it is that Lemieux played only 231 games between 1989 and 1994 and scored 194 goals and 496 points in that frame. If he had played the possible 420 games and scored 352 goals and 901 points at the same scoring rate...he'd have 848 goals and 2128 points. He'd have 2 more Art Ross trophies to make it 8.
If Gretzky between 1981 and 1986 hadn't played 394 games with 375 goals and 1036 points but instead 231 games with 220 goals and 607 points. His career totals would be 739 goals and 2428 points. He'd have at least 2 fewer Art Ross trophies, so 8 as well. The 200 point seasons everyone always talks about would be gone, the 92 goal season would be gone. Those benchmarks often used to set Gretzky on a different level just wouldn't exist.
So Lemieux would have more goals, same number of Art Ross. And of course this would assume Gretzky wouldn't have suffered after '86 from after effects of injuries and that Lemieux wouldn't have been better after 1994 without those injuries (both of which seem generous assumptions to Gretzky).
It would
absolutely affect the debate. Sure, Gretzky would still have his proponents, maybe even a plurality of supporters for GOAT, but the argument would be much much closer. I mean even now Lemieux has his guys, but there'd be a lot more of them in this alternate scenario.