Setting aside the copyright issue which Mags has already addressed, it is really a personal choice. My preference is to transcribe shorter articles that are focused on a specific individual (such as obituaries). One of the reasons I like doing that is I can link to indivudal profiles or categories of the people, places, and things that are mentioned in the article/obituary.
If you do want to upload (a non-copyrighted) article, I would suggest cropping it to the relevant information, with a citation in the image and/or in either/both the image comments or in the profile's sources. If there are a lot of images on one profile the source could get 'buried' a few pages away; an image that is cropped to the relevant information could be displayed right in the biography using [[image:filename]]; I would not however display an image of a bunch of unrelated information directly in the bio.