XF 1.2 Need code to show user names of a specific group


Active member
I'm doing some FAQ pages that will be added to the help section of my forum.

In it, I'm making a page to show all Supporting member user names. So far I have the user banner for each group shown on the page. (see screenshot below) Each of these are a seperate group with it's own I.D number. What I want to do is to show the user name of each group under these images.

Can someone provide the code to show these in this manner?