It's definitely possible, as the theming for NodeBB is quite flexible. Earlier this year, I started working on a blog-like theme, based off of some designs by Randy M. Daniel: http://www.randydaniel.me/nodebb-theme
I didn't quite get it to the point of publishing it, so if you're interested in picking up where I left off, feel free!
https://github.com/julianlam/nodebb-theme-viridian
