I just think this is such flawed analysis/argument the "every cup winning team has X so we need one" argument. Winning a championship is so complex, and so much driven by luck too, that breaking it down to this binary of a level is flawed.
Europeans weren't supposed to be able to win cups until they did.
European captains weren't supposed to be able to win cups until they did.
St Louis Blues didn't win their cup with a Norris caliber dmen (Pietrangello isn't it). I don't know that the Capitals did either considered that when they won the best Carlsson had ever finished was 5th. Weegar finished 14th last year. Pens in 09 didn't (and depending on where you fall on Letang they may never have). I'm not sure I'd argue that Letang is a massive upgrade over Weegar.
Canes didn't have a Norris level D.
I'm not even arguing the Flames should be in that conversation in terms of wining a cup, I just don't understand that level of analysis.