And to be clear, I do love the *concept* of the DU, and have said in the past that this concept is one of the (very, very few) truly good things to come out of this game. But I want my Bright, Shining Light Urge.
I don't think it is possible. It might have been with how the urge was shown only in few dialogues in the EA, but as it is now, while you can play resist, the character's backstory is pretty much chaotic evil. I have made it almost through act two, and frankly, the more I've learned about the DU past, the less I've liked my character. And trying to learn about the characters past sometimes lead to a gruesome scene, as they tried to remember, so effectively my playthrough felt like it was about avoiding DU content rather than resisting it.
It is possible - with Durges background it is clear (and please only read this, if you don't care about spoilers),
that they are Bhaals essence and basically his puppet until the tadpole gave them free will - similar to Astarion and Cazador actually. Withers/Jergal will tell you so, when you resist in act 3 and he has to step in to save you. He tells you, that you now will be able to live free from your fathers/master clutches and can finally do, what you want. And if you play Durge as a good character, then that is, what your character would have been without Bhaals influence over you.
"We are all stories in the end. Just make it a good one."