mdiamondstone

authorGrid is a sidebar widget that displays the avatar of any author on your blog with at least one published post in grid form. You 
can set how large the avatar should be, how many columns (or rows) you’d like in the grid, and the display title of the widget.

Author Grid

Sidebar widget that displays the avatar of all of the authors on your blog in grid form.

Web Guy

Allows users of your site to set custom profile pics from the local media library.
Set a profile pic under: Users > Profile > Profile Picture > Select Profile Pic

Local Profile Pics

Allows users of your site to set custom profile pics from the local media library.

Author Grid vs Local Profile Pics