| 1 | James T. or James K. Ahart | Dow City, IA | | Jun 20 2006 |
| 2 | Oba C. Herschberger | Sullivan, IL | Oct 07 2008 | Oct 10 2008 |
| 3 | John J. Hershberger | Hazleton, IA | Nov 01 2008 | Nov 10 2008 |
| 4 | Dr. Michael R. Stone | Fremont, OH | Jul 01 2009 | Jul 09 2009 |
| 5 | Travis &/or Shari Westerfeld | Batesville, IN | Jul 16 2016 | Jul 26 2016 |
| 6 | Dr. Michael R. Stone | Fremont, OH | Feb 06 2017 | Mar 17 2017 |
| 7 | James T. or James K. Ahart | Dow City, IA | Mar 24 2017 | May 11 2017 |
| 8 | Marlin R. Miller | New Paris, IN | Apr 12 2019 | Apr 25 2019 |
| 9 | Daniel R. Benson | Crestwood, KY | Sep 01 2020 | Oct 26 2020 |
