Babashka: A quick example
juxt.pro
juxt.pro
Unfortunately, as worse is better, markdown is on the way to win.
Markdown's great for simple readme, or if you don't need to (say) right align an image, of apply a class to a paragraph (eg. To turn it into an inset).
While I personally prefer textile (which is a deader dodo than asciidoc), they are both able to do significantly more than markdown.
I look at the problem as: if markdown forces me to write html, then I may as well use html...
(Ps: in textile "> hello world" at the start of a line sets right alignment, "=" for justified, "p.inset#my_id hello world" applies an "inset" class to the para and gives it the id "my_id". Asciidoc is similar, but I'm not familiar enough with it to write it on my phone just now)