Throughout that period, at various points, Randy Johnson, Pedro Martinez, Johan Santana, Justin Verlander, and Clayton Kershaw were head-and-shoulders better than Doc. Probably would agree that over this arbitrarily defined 10-year period Halladay may have been the best pitcher on balance, although CC Sabathia is not very far behind. But he was really only even arguably "the best pitcher in baseball" for the last 3 or 4 years of that span, and even then I think I'd take Verlander and Kershaw, as implied above. 2011 is the only year in which he led his league in ERA+. Kershaw is still just 25 and he's done it twice. Santana did it 2004-2006 - clearly he was the "best pitcher in the world" at that time. Verlander's done it twice. And those other two guys I named did it 6 and 5 times, respectively - twice each during the arbitrarily defined 10-year period in which Halladay is supposed to have been the best pitcher in baseball. In summary - yes, it just so happens that with the way different pitchers' careers happened to line up, Halladay was probably on balance the best pitcher in a decade in which is best competition was CC Sabathia and Tim Hudson. But guys who overlap the front and back halves of the career were far more dominant than Halladay ever was. And it's not even like Johan Santana is ever going to sniff the Hall. Because durability and longevity count; Halladay was durable, but his longevity leaves a huge amount to be desired.
It's clear from the tone of the last 2 posts that you're not going to change your mind. In fact, it's getting increasingly clear you expected people to just agree with you when you made the thread, and now it turns out that very few do. There's a very good reason for that - guys who retire at age 36 just don't tend to make the hall unless they die or were Koufax dominant. Halladay wasn't even close.