Why isn't Esposito considered in the Big 4 then, or making it a Big 5? As a lifelong Penguins fan, I am quick to admit I think Mario is easily the weakest of the big 4, but the above makes me wonder why he is seen over Espo if true.
Esposito has better scoring results versus his peers than Lemieux (
The Panther is probably referring to VsX) because he played largely complete seasons, and VsX doesn't account for injury time. One has to remember, though, that Lemieux still managed one additional Art Ross win (6 to 5) despite his spotty health.
Esposito without Orr still would have been the best offensive forward of the early 70's. From 68-69 through 74-75, he had 912 points in 539 games, followed by Ratelle with 585 points in 516 games. Esposito averaged 130+ points per 78-game season. No one else even averaged a 90-point pace per 78-game season (Ratelle averages 88 points). Looking at peer comparison, just remember that today, the Art Ross runner-up always seems to score just under 90 points. Today, Esposito-like scorer (boosted by an Orr-like defenseman) would be averaging 130 points per 82 games.
How much of Esposito's offense are we willing to attribute to Orr? Year by year,
Esposito hit 126 points in 74 games when Orr had 64 points in 67 games. That would have been Esposito's Art Ross even without Orr (since Orr was still one year away from becoming superhuman).
In 69-70, Orr had 120 points while Esposito had only 99... but that was over Mikita's 86 and Goyette's 78. Without Orr, Esposito would have had a shot at the Art Ross himself, although depending on how much you think Orr helped Esposito, you might assume Esposito would have more likely finished second behind Mikita. Esposito would have at least been an Art Ross contender.
In 70-71, Esposito set records for goals and points (76 and 152). The next three scorers were all from Boston (Orr, Bucyk, and Hodge). The next closest non-Bruin scorer was Hull with 96 points. If you think Orr boosted Esposito, then it's logical to assume that Orr also boosted Bucyk and Hodge. Minus Orr, Esposito would have still won that Art Ross. Esposito had a 56-point lead over Hull, after all. That's not disappearing even without Orr.
In 71-72, Esposito had 133 points, followed by Orr with 117 and Ratelle with 109. Without Orr, Esposito would have at least been an Art Ross contender if you think his 24-point lead over Ratelle would have evaporated.
In 72-73, Esposito had 130 points, followed by Clarke with 104 and Orr with 101. Again, Esposito would have at least been an Art Ross contender (even if Clarke would have definitely been the better player by this point).
In 73-74, Esposito had 145 points, followed by three Bruins once more (Orr, Hodge, and Cashman). The highest scoring non-Bruin was Clarke with 87 points. Again, assuming Orr boosted all Boston players, without Orr, Esposito would have definitely won the Art Ross. A 58-point lead wouldn't entirely evaporate.
In 74-75, Orr was the Art Ross winner. Esposito led the next-leading scorer (Dionne) by only 6 points. Chances are that Dionne would have won this race without Orr.
In summary, over Esposito's prime minus Orr, it's safe to guess:
1967-68: top-5 scorer
1968-69: Art Ross win
1969-70: Art Ross contender
1970-71: Art Ross win
1971-72: Art Ross contender
1972-73: Art Ross contender
1973-74: Art Ross win
1974-75: top-10 scorer
That's a pretty impressive prime in terms of offense.