PPG is a weak argument when Gretzky played with Messier, Kurri, Coffey, Anderson. Teams that lit up opposing teams for 446 and 426 goals.
I would put Lemieux's 199 PTS in 88-89 above Gretzky's best seasons. The best offensive weapon that team had besides Lemieux and Coffey was Rob Brown. The same Brown who benefited from playing with Mario that season and never reached 100 PTS again.
Mario accounted for 25% of the pens total goals that season while compiling a better S% than Gretzky had ever reached. If Mario played with more gifted wingers and had a team that destroyed opposing goalies for 420-440 goals, he would have exploded past 215 PTS.
On Mario's best day he was more talented than Gretzky.
Gretzky regularly played with Semenko or Marty McSorley on wing or defence. Check out the 50 goals in 39 games match footage or his 802nd goal for some of the most notable examples. Lemieux did not play with an enforcer in the pre-instigator era (thinking about the first example).
Messier would be a Ryan Getzlaf without Gretzky and in a different scoring era, let's be real. But anyways, about guys like Kurri, I take it more as that Gretzky elevated the players he played with. Kurri with Gretzky and Kurri without Gretzky were like two different players.
Gretzky played with several guys who were out of the league soon after he retired in his final two seasons in New York. He's lucky he experienced it at the end of his career instead of the beginning, but we'll never know Mario's full potential. By the 1990-1991 playoffs Mario had a better team than Gretzky's Kings though, without a doubt.
My money is on Gretzky. I don't expect you to agree with me, but Mario left more questions than answers.
To give another example, Lindros first five seasons he scored at such a pace that a concussion-free Lindros might have been that kind of guy if he could play entirely before the dead puck era, and had been healthy. Mario and Lindros are both two guys whose prime careers were cut tragically short, but Lemieux always bounced back.
Looking back, Lemeiux and Jagr was something else in 2000-2001. Lemieux had 76 points in 43 games from when he returned, and didn't miss a single game I think, helping Jagr to a 5th and final scoring title. Lemieux nearly had another one at age 37 in 2002-2003. Like I said, what could have been. Lemeiux has some amazing accomplishments, but injuries, a back condition he was born with, and disease kept him from even hitting 1000 games. No one can really prove or disprove if he was #1 or not because of that.
I also want to add, that in 1995-1996, outside of power plays Jagr played with Francis on the second line, not Lemieux, and only finished 12 points behind Lemeiux in 12 more games. He also didn't score a hat trick or have a five point game, and the reason Lemieux missed 12 games was to rest his back in back-to-back road games. That most likely artificially improved his points per game, even though Lemieux had no real choice. For my money, Jagr's consistency in 149 points (a non-Canadian record) on the second line at a steady rate, including more at even strength, puts Jagr's 1995-1996 as almost as dominant as Mario's (and the league's) final 150+ point season, 161. 149 is the most by a non-centre as well, ever, not just a non-Canadian.
Simply put, those were two generational talents on one team there to pull those numbers as late as 1995-1996. Jagr's 1998-1999, and I'm sure, if he were healthy, Lemeiux's 2000-2001 are the closest since.
The reality is that, #1-5 or whatever doesn't matter. I do give both Mario and Jagr credit for single-handedly delaying the dead puck era though, something Gretzky may have been too old or small to do, so give Mario #1 if you want, or #2 like me. Doesn't matter, they're all winners.