This tutorial provides the steps to get the list of all users in the site, loop through them and if the user has published at least one post, display the user's avatar, display name and job title (a custom user profile field) and use CSS Grid with a Flebox fallback to display the results in a grid.
Great code and nice idea. I implemented it as soon as I saw it and it was very easy to do so.
There are 2 things that I think should be employed
1. use media queries for the mobile version. 3 authors in a row is a little too much
2. Add a template for the author showing a short bio and all the posts from the author.
Regarding #2, see https://sridharkatakam.com/custom-author-archive-intro-genesis/.
Possible to get a widgetised version of this for a homepage?