Of all the Simplicity steampunk patterns, my new favorite is Simplicity 1819. All of its components (with the possible exception of the shirt) are attractive. I've made the long skirt, which is a nice all-purpose steampunk skirt. I intend to make both the bolero and the short overskirt eventually. And now I've also made the corset.
I totally ignored the instructions that came with it, of course and just made it the way I would any corset. This is an unaltered version of the pattern, since I made it as a display sample, not to fit someone particular. I really like the finished look. It would probably be a pretty good first corset pattern for someone to work with.