Hi Chip,
Thanks for reaching out and for using our products!
As I understand it, you would like to include the attendees’ names, in addition to their avatar. It seems like you already understand where to edit the code, but just in case, our Themer’s Guide can help to get you started: https://theeventscalendar.com/knowledgebase/themers-guide/
You will want to locate this file in your WordPress folder: /wp-content/plugins/event-tickets-plus/src/views/attendees-list.php
Then copy this file and place the copy into a new folder called tribe-events in your theme’s folder. Any changes you make to this copy will be reflected in your attendee lists on your site.
This snippet may help you to add the names onto the attendee list: https://gist.github.com/cliffordp/718af5da51046f60b92372d01804f433
Also, please feel free to add or vote on this idea, as we tend to implement suggestions based on popularity: https://tribe.uservoice.com/forums/195723-feature-ideas
Please let us know how it goes and if there’s anything else we can do to help!