Konrad was drafted in 99, which was 4 drafts ago. Picks from the past 3 drafts (not counting the most recent draft, since we don't know how they'll play yet) who start or are significant contributors: Chambers, Wade, McMichael, Minor, and Ogunleye (college FA signed right after the draft who we obviously had on our draft board). Also, even if Greenwood doesn't start, he'll at least be a top back-up at OLB and could start once again when Seau leaves. The same could be said of Freeman, who was drafted in '00 and has started, will probably be a top reserve this year, but may start again in the future. McKinney looks to start either this year or next. Lowe could be the one who takes the playing time away from Fletcher.
Overall, we've had decent drafts the past three years. We've had some players who have not played as well as their draft status would merit: Fletcher and Greenwood come to mind (okay, Ben Kelly was a bomb for a 3rd rounder). We've had some great finds: Chambers and McMichael. And we've had a number of players who have been decent but not outstanding (at least not yet). Part of the problem, as mentioned earlier, is the lack of firepower at the top of the draft board. We haven't had first round picks, and we've been in the lower half of the draft order. Part of that comes from success on the field, and part of that comes from the other roster moves we have made (trades).
Maybe some of what you are saying, PhinPhan, is true--that we need to do better than a "decent" job at our drafts if we want to be among the elite teams in the league.