Tom, I think you are on the right track...
One feature we would like to add to Shozam is to provide the option in Step 3 to assign a URL as a target for an album. This way you could create a 'parent' gallery and have each album point to the respective URLs of other galleries. So you can create and upload full galleries, in your case one for each photographer. Then you can create a new 'parent' gallery, where you create albums, one for each photographer, and containing typically just one image in each album. In Step 3, you would assign the respective artist album to point to their respective full gallery. You could control what pages you want to give access to in the parent gallery by hiding links using the Label tab in Step 5.
So now the intro page of the new 'parent' gallery will be the main intro page. It will show thumbnails identifying each photographer. Clicking on the album thumbnail will take the visitor to the intro page for the gallery of that photographer. Or, depending on hte URL assigned, you can have it go to the Info Page or some Details Page of their gallery.
For now, you can probably do the same but will have to manually accomplish the steps that is now missing in Shozam. That is, once you have the parent gallery implemented, to go to the intro page and edit the HTML so the intro page album thumbnails point to their respective 'child' galleries.
If you go on this path, would be really interested in your feedback and see if we would need anything else in Shozam to enable creating such hierarchies consisting of galleries of galleries.