I also think Dorsey compares to Leonard Marshall, who was coincidentally an LSU guy.
Being able to grab a guy that perfectly fits a need, and that can compliment and improve the play of other players, has more value. It doesn't happen that often. I don't think there is any player in this draft, at any position, that fits the Saints needs as perfectly as Dorsey. He's a better fit than Ellis.
Saying that, I also agree this is more about shaking the tree than it is a real possibility.