Subban has absolutely no case in the world to be considered above Karlsson and Doughty, his career is like 1/3 of theirs. Weber is closer, but I think still clearly behind them. I’ll make a poll on the best defenseman of the 10s with Doughty, Karlsson, Keith and Weber.
Subban has a Norris, two as1, one as 2, a top 3 conn smythe, went to the finals and he was the best defender in the world from 13 to 15 IMO. He is also 3rd in the league in that decade for points in playoffs, something that is worth considering IMO, especially since the two above him played on very good teams (Letang and Keith) hes three points behind Letang and 13 behind Keith, all while playing less games.
Weber and Subban both have the same number of points in the 10s, Doughty has 21 more but with a .56 ppg vs .6 for the other two. Karlsson is obviously far and above all of them offensively.
They all have a case, and I should add that Burns and Letang also do have a case IMO.
Burns has the single-most dominant season of the 10s as a D, IMO.
Letang and Weber have consistency, I believe they have the most top 10 norris nods of all mentionned. 9 for Weber.
You know what? Hedman probably belongs here too. Im on my phone so I cant list all their cases, but I find it very tough to discern who was the best of the best.