Doughty is up there (4th?), but I think the greatest L.A. King is a three-way race between Dionne, Robitaille, and Gretzky. I could see a case for each of those three, for sure.
It might be an unpopular opinion, but I've started to think that Mats Sundin is the greatest Maple Leaf ever. There are a few guys (Broda? Gilmour?) who peaked higher, but no one I see had 13 great seasons in a row for the blue & white. We've shown before that Sundin was probably the most consistent scoring forward ever (like, in NHL history) over a long period, and doing that with a not-very-talented Leafs team, while also performing as team captain for a long time, is very impressive (and he had two 2nd-team All Stars at center). The only thing Sundin missed was playoff success, but that goes for every Leaf since 1967.
There are good debates on this for other Canadien teams, notably the Canucks, Flames, and Canadiens (I call Hawerchuk for Jets, and Stastny for NHL Nordiques, though you can quibble about young Sakic).
For the Canucks, I think Bure was the the most talented and most exciting player they ever had... but he was limited in what he could do, and he didn't play at a peak level for that long (or that consistently). The Sedins for sure (but are they one human?), Naslund, Linden, and even Smyl have their supporters.
The Flames seem to come down to MacInnis, Fleury, Iginla, and Kiprusoff (some might even name Kent Nilsson or Joe Nieuwendyk). A case can be made for all four.
The Canadiens had a wealth of tremendous players from the 1940s through 1980s. We tend to focus on the 'big three' forwards -- M. Richard, Beliveau, and Lafleur -- but then again, there's Plante, Dryden, Roy in net, and Harvey (nine 1st-team All Stars, six Norrises), Robinson, etc., etc. on defence.
Rangers is another interesting one...