When you find a number of elite players talking about how John Madden was so damn good defensively and made things so much more difficult for them when he was on the ice, get back to me. When you find Madden's first vote for end-of-season NHL All-Star, let me know as well
When you then find guys raving about Madden's leadership, presence, poise, and intangibles and how they saw him as a key part of the locker room and that everyone saw him sacrificing his talent for the good of the team and inspiring others to step it up and the deep respect they had for him, ... again, let me know.
Again, the game of hockey is not all about offense. I didn't realize the Hockey Hall of Fame was only for offensive players and a handful of goalies, everyone else stay the hell out! If someone was truly outstanding on the defensive side of the game, why not find a spot for them?
Because they had "pedestrian levels of offense?" There are guys who piled up great offensive numbers who had pedestrian levels of defense; should we start shuffling those guys out of the HoF, too? Because I can name a dozen guys who were pretty crappy defensively but got into the HoF on offense and reputation and the excessive hype that went with it.
I've got bad news for you: Carbonneau should probably be in there and probably goes in down the road after the current backlog and older guys just retiring or about to retire get worked through. Lehtinen may well find his way in as well, especially after you consider his play in international tournaments. If Kesler's body hadn't given out, he'd probably be in the discussion too. [And I'm talking starting in 2012, not just recently.] Ramsay was [and still is] underappreciated, mainly because he played on Buffalo teams that were never top-tier and never went far. Peca is borderline.
Start naming them and how they were instrumental, I'll tell you why they're not in.
The fact that you mention him as a defensive specialist just helps make my point. he wasn't just a defensive specialist, he was the defensive specialist. Again, go read what other players who played against him had to say. They thought a hell of a lot more highly of him than you do.
I think both of them were fairly decent defensive forwards, and neither one was half as good as Bob Gainey defensively.
There's a few reasons Bob Gainey landed on the NHL's "100 Greatest of All Time" list. You should read up to try and figure it out. Or, claim that hundreds of people who cover the sport and watched him play and played against him have no idea what they're talking about, and you know so much better from the comfort of your keyboard despite apparently having never watched him play at all.