Not that you don't make an argument that makes me think, but that list is really misleading. A lot of those guys were later draft picks anyway. Dunlap's scored 20 sacks in three years, Greg Hardy just racked up 11 last year for Carolina. Fairley had 5.5 last year and he's a DT. Johnson, as you noted, is pretty good. Some of those guys are listed for no reason because they haven't played in the league yet, and a couple are on there with just one year of experience.
For a more accurate read, Jones should be compared to the other first round caliber guys. Dunlap, Harvey, Anderson and Fairley were all first rounders (I could be missing a few but didn't check all of them). Dunlap's done well. Fairley has done well at least as a pass rusher (5.5 sacks is pretty high for a DT). The other two were busts. That's a small sample size to really draw from.
And a couple of the other guys on your list far exceeded expectations. Hardy was a 6th rounder, Johnson a 3rd.