You have made some interesting observations, but I respectfully disagree with your overall conlusions.
Statistics are great, and as you point out, can be used to further an agenda. What's the old saying... there are lies, damned lies, and statistics?
The reason I brought up the statistical argument in the first place was that when people talk about Gretzky, they always point out his stats. Always. Just look at the last couple of pages on this thread, and you can see what I'm talking about. But as one who lived through and witnessed both of their careers, I can tell you one thing: The difference between the style of hockey played in the first half of the 70s when Orr played, and the 80s when Gretzky was destroying records, was like night and day.
By comparing their numbers in the context of league-wide goals-per-game during their respective eras (which was 24% higher in the 80s), I was attempting to "level the playing field". Plus, using scoring stats alone as a way to compare player (a) who is a forward, with player (b) who is a defenceman, is just plain silly to begin with. The fact remains that Orr played a much more demanding position, based in the defensive zone, in an era where goals were harder to come by. Despite this, Gretzky still only outscored him by approximately a 3:2 ratio during their best years. That alone should tell us something about what an incredible offensive talent Orr was.
Back to your numbers:
You excluded Orr and Gretzky-fair enough, but also Lemieux. Then you included Esposito, who was the prime beneficiary of Orr's creative genius. Look at what happened to Phil when he left Boston (and Orr):
73-74 (Bos) 68G, 77A, 145Pts
74-75 (Bos) 61G, 66A, 127Pts
---traded---
75-76 (NYR) 29G, 38A, 67Pts (over 62 games)
76-77 (NYR) 34G, 46A, 80Pts
77-78 (NYR) 38G, 43A, 81Pts
That's a sudden, dramatic drop in production. I wonder why...
Let's face it. Orr and Gretzky were both in the genius class when it came to generating offense, and anyone playing with either of them was going to see their numbers go up substantially. So what I've done here is to list the 100 point players from Orr's post-expansion days, and from Gretzky's peak years in the 80s, excluding them and their teammates. The result is eye-opening:
Orr's era:
67-68: none
68-69: Hull 107, Howe 103
69-70: none
70-71: none
71-72: Ratelle 109, Hadfield 106
72-73: Clarke 104, MacLeish 100
73-74: none
74-75: Dionne 121, Lafleur 119, P Mahovlich 117, Clarke 116, Robert 100
Gretzky's era with Oilers:
79-80: Dionne 137, Lafleur 125, Perreault 106, Rogers 105, Trottier 104, Stoughton 100
80-81: Dionne 135, Nilsson 131, Bossy 119, Taylor 112, Stastny 109, Simmer 105 (in 65 games), Rogers 105, Federko 104, Trottier 103, Middleton 103, J. Richard 103
81-82: Bossy 147, Stastny 139, Maruk 136, Trottier 129, Savard 119, Dionne 117, Bobby Smith 114, Ciccarelli 106, Taylor 106, Hawerchuk 103, Rogers 103
82-83: Stastny 124, Savard 120, Bossy 118, Pederson 107, Dionne 107, Goulet 105, Nilsson 104,
83-84: Goulet 121, Stastny 119, Bossy 118, Pederson, 116, Trottier 111, Federko 107, Middleton 105, Hawerchuk 102
84-85: Hawerchuk 130, Dionne 126, Bossy 117, Ogrodnick 105, Savard 105, Federko 103, Gartner 102, B. Sutter 102, Paul MacLean 101
85-86: Lemieux 141, Bossy 123, Stastny 122, Savard 116, Naslund 110, Hawerchuk 105, Broten 105, Goulet 104, Federko 102, Tonelli 100
86-87: Lemieux 107, Gilmour 105, Ciccarelli 103, Goulet 100, Hawerchuk 100
87-88: Lemieux 168, Savard 131, Hawerchuk 121, Robitaille 111, Stastny 111, Carson 107, Loob 106, Goulet 106, Bullard 103, Yzerman 102
Other than by Orr and his teammates, the 100 point plateau was reached just 11 times over 8 years.
Aside from Gretzky and his teammates, the 100 point mark was reached an incredible 77 times over 9 years.
Those mind boggling numbers should open anyone's eyes to the huge difference between the style of game played during Orr's era and Gretzky's. In the 80s, it was all offense, offense, offense.
Now please, tell me it wasn't a hell of a lot easier to score during the 80s than the early 70s. In this light, Orr scoring 139 points as a defenseman in the tighter defensive hockey of '71 is every bit as amazing as Gretzky, a centre, getting 215 points in the wide-open game of '85-86.