Stastny, Dionne, Trottier, Bossy, Hawerchuk, Yzerman and Savard aren't good competition? Then Lemieux starting in the mid 1980s. It doesn't matter, Gretzky outscored them by 60-70 points routinely. You really think if Sergei Makarov was in the NHL it would have changed anything for him? Maybe Makarov would be as good as Kurri. But that doesn't change Gretzky's records. When you have a 51 game scoring streak in 1984 and your point totals in that streak (153) alone would have dominated the scoring race does it really matter that there wasn't a star player from Sweden around (and there was with Nilsson) in the NHL?
As for Lemieux nothing changed from the 1980s with a more North American NHL to the 1990s with the European invasion. In 1993:
Lemieux - 160 points (60 games)
Lafontaine - 148
Oates - 142
Yzerman - 137
Selanne - 132
Turgeon - 132
Mogilny - 127
Gilmour - 127
Top 8 in scoring has 5 Canadians, two Euros and an American
1996:
Lemieux - 161 (70 games)
Jagr - 149
Sakic - 120
Francis - 119
Forsberg - 116
Lindros - 115
Kariya - 108
Selanne - 108
Fedorov - 107
Mogilny - 107
5 Europeans and 5 Canadians in the top 10 in scoring. I am seeing a pattern here with Lemieux regardless of who he is competing against.
None of this ought to take what we see from McDavid of course, but for whatever reason there is this obsession to discredit the two most offensive players in history.