Well we wouldn't be a background character, we would be the main one, and we would be participating in much more interesting plot lines, and intrigues with in the land while a possible unavoidable disaster descends on the world. I mean this pretty much already the way the game plays out for most people as they don't touch the main quest for hours, and hours as the main quest give rather lame plot development, and rewards.
Ok. So...you don't want to be a background character, I get that. You are the main character, and you are responsible for...what? Enlighten me, because I don't know how you can write the main story
without being a savior. Even in DA:2 your character was a hero, responsible for the downfall of a great corruption. Isn't that also saving the world?
No matter how you write the story, if your character is a 'hero' it's going to involve saving something. I'm honestly curious how you would like to see the story work.