| Palmquist | Steven | Cedar Falls | 2007 |
| Osdoba | Frank | Bullhead City | 2008 |
| Crouch | Randall | Sioux City | 2009 |
| Seiler | Robert | Camanche | 2009 |
| Sheeler | Wade | Newton | 2009 |
| Hansen | Roger | Sioux Falls | 2010 |
| Libby | Stephen | Cedar Rapids | 2010 |
| Brinkerhoff | Charles | Des Moines | 2014 |
| Christians | Kevin | Boone | 2014 |
| Erickson | Robert | Des Moines | 2014 |
| Harshbarger | Shane | Des Moines | 2014 |
| Hatfield | Gene | Des Moines | 2014 |
| Hoffmann | Kurt | Urbandale | 2014 |
| Klaus | John | Mount Vernon | 2014 |
| Megel | Thomas | Des Moines | 2014 |
| Peck | Forest | Council Bluffs | 2014 |
| Risberg | Matthew | Norwalk | 2014 |
| Sharp, Jr. | Edison | Malcolm | 2014 |
| Smith | Kevin | Urbandale | 2014 |
| Wahl | Jerry | Kellogg | 2014 |
| Wieck | Paul | Dysart | 2018 |
| Davis | Craig | West Des Moines | 2019 |
| Oliphant | Paul | Lennox | 2019 |
| Mauch | Everett | 2019 | |
| Tennant | Dakota | 2019 | |
| Oxley | Anthony | Rhodes | 2019 |
| Wheeler | Scott | 2019 | |
| Dennis | Loghry | Woodburn | 2020 |
| Duane | Wachter | Des Moines | 2020 |
| Willard | Loper | Sperry | 2020 |
| Decker | Ian | 2022 | |
| Cassell | Osumana | Cedar Rapids | 2022 |
| Erickson | Fred | Madrid | 2022 |
| Hull | W Scott | 2022 | |
| Ahrens | Brian | Madrid | 2022 |
| Shabacher | Scott | Victor | 2022 |
| Bever | Bryan | Grimes | 2022 |
| Augustus | Terry | Ames | 2022 |
| Vanderkamp | Caryl | Prairie City | 2022 |
| Reichardt | Bradley | Pleasant Hills | 2022 |
| Fremont | Darrell | Des Moines | 2022 |
| Reid | Ryan | Iowa CIty | 2022 |
| Coon | E Jay | Grimes | 2022 |
| Hobson | Daniel | Des Moines | 2023 |
| Brown | A J | 2023 | |
| Cox | Thomas | West Des Moines | 2023 |
| Yeager | Joshua | 2023 | |
| Boomer | Michael | Gilbertville | 2023 |
| Clark | William Jr | Des Moines | 2023 |
| Myhre | Keith | 2023 | |
| Swallow | Frank | Waterloo | 2023 |
| Seals | Saveno | Altoona | 2023 |
| Ashby | David | Ankeny | 2023 |
| Gruis | Thomas | Yrbandale | 2023 |
| Bowersox | Tom | Cedar Rapids | 2023 |
| Holtkamp | Dillon | Wever | 2023 |
| Renner | Nathaniel | Waverly | 2023 |
| Claybaugh | Douglas | Granger | 2023 |
| Reinhardt | Marion | Cedar Rapids | 1996 |
| Hildreth | Bryce | Ankeny | 2008 |
| Anderson | Tim | Albia | 2008 |
| Dryer | David | Indianola | 2009 |
| Osdoba | Frank | Bullhead City | 2010 |
| Hill | Rusty | Perry | 2011 |
| Wolcott | Jason | Tipton | 2012 |
| Sheeler | Wade | Newton | 2013 |
| Crouch | Randall | Sioux City | 2014 |
| Klaus | John | Mount Vernon | 2016 |
| Brickman | Kenneth | Des Moines | 2016 |
| Bowersox | Richard | Cedar Rapids | 2017 |
| Libby | Stephen | Cedar Rapids | 2018 |
| McCampbell | Ricky | Creston | 2019 |
| Elliott | William | Marion | 2019 |
| Anderson | Paul | Iowa City | 2021 |
| Van Der Kamp | Carl J | Prairie City | 2023 |
| Shaulis | Gary W | Cedar Falls | 2023 |
| Harris | Monte L | Bettendorf | 2024 elect |
| Erickson | Frederick L | Madrid | 2024 elect |
| Beard | Christian | Altoona | (MI) |
| Watts | John | Grand Junction | 1973 |
| Johnson | Dwaine | Marshalltown | 1979 |
| Masters Jr. | Albert | Newton | 1983 |
| Yates | Maxie | Sioux City | 1993 |
| Kornhauser | Robert | Mason City | 2003 |
| Smith | Kenneth | Ames | 2003 |
| Gidel | Paul | Des Moines | 1979 |
| Gay | George | Iowa City | 1995 |
| Rank | Norman | Marshalltown | 1997 |
| Simser | Jay | Ames | 1998 |
| Sickels | Melvin | Albia | 2001 |
| Kauten | William | Vero Beach | 2004 |
| Hildreth | Billy | Ankeny | 2008 |
| Seiler | Robert | Camanche | 2010 |
| Radloff | Donald | Clarksville | 2012 |
| Smith | Robert | Charles City | 2015 |
| Kilfoil | Robert | Newton | 2015 |
| Hatfield | Gene | Des Moines | 2017 |
| Andersen | Gregory | Eldora | 2009 |
| Mosier | Donald | Cedar Rapids | 2021 |
| Megel | Thomas | Des Moines | 2018 |
| Bryngelson | Berdette | Marshalltown | 2005 |
| Harrison | George | Sioux City | 2006 |