If the person already knows markdown, Pandoc is a great option [0]. I find it really useful for creating pdfs. I haven't used it to create official documents that often, but I have used it to create Beamer slides and it was a very smooth experience. If you're an advanced user and you want to do something LaTeX-specific you can just write LaTeX inline and Pandoc will accept it.
[0] http://pandoc.org/