I don't know if you remember, but I absolutely loved Philip Rivers and I've followed him at NC State since his freshman year. I would have to agree to a point with the premise of what you are saying, but honestly I WOULD take Ed Reed over most of the guys you've listed. Ed Reed or McKinnie? I take Ed Reed everyday and twice on Sunday. Bryant McKinnie is good, but he isn't dominate like Ed Reed is. IMO there is only one Ed Reed but there are like 10 other LTs that are as good or better than Bryant McKinnie. The same could be applied to Henderson and Haynesworth as well, neither are gamechangers.
I know that there were people that I respected here advocating for Rivers and Roethlisberger in that draft. I thought you might have been one of them, and I think that Russ thought really highly of Roethlisberger.
On the Ed Reed thing, we'll just have to agree to disagree. I was kind of stretching on Bryant McKinnie, but it was late. I
will say that I'd rather have a Top 10 LT than the #1 safety in the NFL.
Henderson has made a lot of noise lately, but he was a dominant player when paired with Marcus Stroud in those mid-90s Jacksonville teams. He's still really, really good. And if you don't think that Albert Haynesworth is a game-changer, I really can't say anything that is going to convince you. To me, he's the best 4-3 DT in the NFL.
EDIT: Let me provide one more caveat--sometimes a team ends up picking toward the top of the draft even though they have a pretty good team. Last year Green Bay found themselves in this position and took B.J. Raji. Pittsburgh seems to be really good for three or four seasons and then turns in a 6-10 stinker and gets another top pick. In those situations, I think you take the BPA, because likely you don't have a glaring hole at one of the core positions on your team; you likely suffered one or two key injuries at the wrong time and ended up not being competitive.
Look at Detroit in the early 2000s. They took Harrington and suffered with him for a year. Then they take three WRs in a row with the #2, 7, and 10th overall picks. Roy Williams worked out okay for them for a while, but they ended up going WR, WR, WR, LB, WR in five years of Top 10 picks. They never got better. They passed on DeMarcus Ware, Shawne Merriman, and Jammal Brown to take a guy who hadn't played in a meaningful football game in a year and a half in 2005.
Now? They're starting from scratch with a new quarterback, and are going to build one of their lines with their next marquee pick.