That's the standard party for most players if you're going good. I actually really like that party. I've only ever tried out a few other people. The bard and the emo wizard are amusing but hardly worth putting a lot of effort into. If I remember correctly, Imoen will try to stick it out with you to almost the extreme edges of her conscience. I've never went on a murdering spree to test her allegiance but everyone else starts to complain pretty readily, but as long as you keep their complaints in mind they typically won't bail. Minsc is probably the only exception. Being a good dude doesn't keep him happy, he requires something. That might be a spoiler so I'll just leave it at that for now. Suffice to say I damn near got my ass kicked by him once when he got upset over it