Since the lockout, the Wings, Ducks, and Bruins won without bottoming out. The Bruins did have Seguin but he was a rookie. The Rangers and Sharks could have easily won with a couple of bounces. Neither team bottomed out.
2 of those teams won the first 2 seasons after the lockout.
How long did it take the Rangers to build up their cache of home grown talent before being in a position to ice a cup contending roster that way? 8 years?
You can make this happen MUCH faster by doing this the way that I'm saying.
Also Marelau was a 2nd overall pick and they got a sweetheart deal for Thornton from Boston (Who was a 1OA in the same draft.) The latter of those things isn't something you can really rely on.
Also, Thornton got traded to San Jose in 2006, they didn't get to the finals until 2016. I don't know if they the example you want to be using. Sure they've been competitive for a while, they're sort of the west coast version of this era of Rangers, except their elite talent was a C instead of a G.