Simplicity actually makes a Snow White pattern
. I have it because we are using it as a basis for my future sister-in-law's Twisted Snow White and later a regular version. It has the same issue as the pattern you linked, in that the bodice and skirt are connected. But we decided to just make the skirt a simpler A-line one since we didn't like all the gathers in the pattern and will use the bodice from the pattern. We are going to just line and hem the top and use boning in it to give it a good shape so that it stays close to her body. We haven't decided yet if we are going to use a zipper or lace up the back, but you could easily modify it to lace like a corset if you wanted to.