'depends on what you call Generational. TO me its someone who is one of the top 5 dmen throughout his career. Doughty sure has been one of the top 3 dmen in the last 10 years. SO id definitly say generational. Stanley cup x 2, norris, olympic gold. etc. Generational talent on D.
Doughty and Karlsson are the best two D from anyone drafted between 2005-2016.
Crosby Ovechkin Malkin from 2004 to 2014...Stamkos woulda have been close to it had he not gotten injured twice. and those doubting Stamkos. look at his stats from his 1st 3 seasons and comapre them to what matthews the god is doing now.
P.S. Forgot Yakupov