Here is who has been mentioned so far in this thread.
Total Restoration:
Christopher Hutchins - High End Pins - http://www.highendpins.com/ - North Carolina
Jeff Miller - Pinball Pimp - http://www.pinballpimp.com/ - Florida
Toast-Mach 1 Restorations https://www.facebook.com/ToastMach1Pinball/ - New York
Ken Head - PINHEAD52 - https://pinside.com/pinball/community/pinsiders/pinhead52 - Texas
Bryan Kelly - Probably retired but still grumpy! - https://pinside.com/pinball/community/pinsiders/bryan_kelly
Playfields Only:
Ron Kruzman - https://pinballplayfieldskruzman.com/ - Michigan