Dave of Canada wrote...
You're still capable of seeing enough of Bhelen even without touching the Dwarf Noble, otherwise the majority of people wouldn't have sided with Harrowmont at first only to find themselves metagaming down the line.
Dark Ritual doesn't really count because there's no implied consequences, it might result in the "happiest" of the endings. More so since it's implied to involve mages in DA2 which everybody and their mother supports.
Oh yes, I agree, but you don't really get the true amount of him until you play DN. I mean, when you hear "I promised his father on his deathbed that I wouldn't let him ascend the throne", you figure that's some insane exaggeration. And then you find out that it's actually rather likely. ~_~
Dark Ritual counts; it's a chaotic, selfish action that you don't know the outcome of. And depending on your relationship and view of Morrigan, it can be making a deal with the devil. You can either:
a) Kill the Archdemon at the cost of your / your ally's soul, which will definately put down the Archdemon.
or

Trust in Morrigan's (supposedly) untested ritual that *might* work, but it gives Morrigan (and potentially Flemeth) power over a god child.
B isn't the choice of a Lawful Good (or Paragon, if you would prefer) character, and if it results in the happiest of endings, that ending is something the more morally ambiguous would get.
And you all are quite incorrect; Paragon Shepard is pretty clearly Chaotic Good (or Neutral Good who veers into Chaotic Good now and then), not Lawful Good. I actually don't think any Spectre *can* be lawful good; their entire purpose is to enact the will of the Council outside of the law. Renegade Shepard, in my opinion, seems to vary from Chaotic Neutral to Chaotic Evil (just from some of the less sensible and more violent choices, not the major ones).