I don't think the PED stuff should exclude anybody, I'd vote for all these guys.
But, I think there is markedly less stink on Ortiz than there is on Bonds and Clemens. If your threshold for PED tolerance is very high like mine, then all should be in. If your threshold is very low (any) then all should be out. But I think someone reasonable could also have a threshold somewhere in the middle and have Ortiz pass it while the others fail.
I guess to put it another way, I can see not holding the anonymous testing trials against Ortiz (and any others on that list we don't know about) while holding positive tests leading to suspension once the system was fully implemented against guys like Manny and ARod. I'd put the level of knowledge we have about Bonds and Clemens' usage (and Sheffiled) on par with a failed test and suspension and more severe than being caught in the anonymous part and then having that not remain anonymous. Isn't it plausible that Ortiz' positive on that test would've been overturned on appeal and we'd never have known about it if it was part of the real testing process? We know certain initial positive results are overturned under the current system.
I fall in this category. Ortiz offends me less than Bonds or Clemens. There's something a little less official about anonymous tests that he allegedly failed, and there were so many banned and dirty substances floating around then that it isn't infeasible that he wasn't aware something he was taking was banned. That doesn't completely absolve him of course - you're responsible for what goes in your body - but it feels markedly less deceitful than the full doping regimens that Bonds and Clemens were on.
As for him being worthy on his hitting merits alone, I think he's someone who has, for lack of a better way to describe it, a HoF mystique surrounding him. I haven't looked into the stats, but I would be completely unsurprised if Edgar Martinez was the better hitter, but who never had the opportunity to shine in the spotlight, again and again. Big (dare I say, legendary), moments in baseball history can define a career, and Ortiz has had several.