Dave Chesson from Kindlepreneur. This guy has an incredible array of useful self-publishing tools. It would exciting and educational to hear him talk about the industry and how to get books into the marketplace.
Mel Jolly - She is an exceptionally motivational speaker on social networking, developing and writing newsletters and other promotional materials, and a solid resource. https://meljolly.com/
Chris Holm - Award winning author of CHILD ZERO. His work has been selected for THE BEST AMERICAN MYSTERY STORIES, named a New York Times Editors’ Choice, garnered praise from Stephen King, and won a number of awards, including the 2016 Anthony Award for Best Novel. https://chrisfholm.blogspot.com/p/about.html
Others?