Actually it's eight top-quality ends who won defensive rookie of the year, which ties for the most at any position in that 20-year span.
And what are the requirements for "defensive rookie of the year"? To be a rookie, and to be better than the other rookies. That's it. Just because someone is the best rookie doesn't mean they're good. Just that they're the best of the group of young players who came into the league. Again, 6 out of 88 players over 20 years. Not good.
I don't know how Bosa will work out (or how any draft pick will workout). I know that he was a disruptive player in college who consistently got into the backfield and made plays behind the line of scrirmmage. I know that he's fantastic at hand-fighting and has really good movement skills to quickly go inside-out or outside-in on a blocker. I know once he gets a free path to a QB he explodes into him with force.
Is he a better talent than the players used as an example? I don't know. That's the trick with the draft.
His measurables aren't close to any of the players you've mentioned. The players you're mentioning we're running 40-yard times in the 4.5's and 4.6's, not 4.86 like Bosa. If you would like to make the case that he's in their class, I'd be happy to debate it.
A lot of draft pundits don't believe that the QBs in this draft are as good as in previous drafts, but you seem to believe we should take one at No. 4. I believe Bosa would have been a top pick in last year's draft, can you say the same for these QBs or is their stock being elevated simply because there's no one else available at their position?
Your belief is just that, a belief, we have no way of knowing about it one way or the other, do we? It's purely speculation unable to be proven or disproven.
They very well might not be as good as previous drafts, but we're also not picking at #1 or #2 overall either.
And despite any questions, both Goff and Wentz are ranked in the top 10 overall. I can spend the money and get a better pass rusher than Joey Bosa today in Mario Williams. What I can't do is get a potential franchise quarterback. If teams even think they have them, they never hit the market. When guys like Cousins and Bradford are getting $18-$19 million a year, that's crystal clear.