Unnumbered headings word_document

OK. Give me a couple of days.
I am hoping to show to my colleagues most of us work using latex (some of us for several decades) how they can use markdown to create reports in word using the company report template. The driver for this is the familiar need to work with non-latex user colleagues.
Heading into the bookdown, officedown, officer way seems tricky where it seems some features break using one package or another and trying to find the best single approach seems difficult.
I appreciate the help provided and I realise the developers don't have time or any real reason to address specific issues with specific Word templates . At the end of all this I will write a Rmd file that gives detals about what they can achieve using one (or more) of these packages.