I have to admit that I’m struggling with the concept of displaying ‘articles’ as images, but I’m guessing you’re trying to show your writing in context as it was used / published and therefore want to show a screenshot of that context rather than just your writing.
If indeed each article is an image (forgetting the PDFs for a minute), a photo gallery might work.
However, I lean toward a repeater connecting to a dynamic page that displays the image. That page could then also include any useful commentary about the image. Something like we’ve done with these pieces of art. Both pages open from repeaters on other ‘index’ pages.
Are there other people lurking here with ideas for CC?