Molongui Authorship Pro allows you to easily display all the authors in your site. And you can make it display as a list or grid. You just need to use the provided shortcode.
Since version 1.5.4, the list gets pagination when the number of authors to list is bigger than 30. That is so to prevent hurting page load speed when listing many authors.
You can easily disable automatic pagination by adding the paginate=0 attribute to the shortcode. So the shortcode would look something like:
[molongui_author_list output=grid paginate=0]