Well Melinda, for example, while being a professional backup singer, had gotten to the point where she didn't have the confidence to think she could ever be a front person, and now she is showing herself, and the pop world otherwise. She is hands down the best singer I have ever seen on Idol. Seriously. She might not have the whole package, but vocally she is strong, accurate, articulate, classy and has a great texture to her voice. She hasn't been off key once in the competition yet.
Sundance was better than the indian kid indeed, but he would have been offed soon enough. He's a powerful singer but has been out of key all over in his lower range and sounds more like a bar singer most times.
Stephanie is also a very talented singer for the girls group.