There are no candidates that will even address this underlying truth of government, and even if one did, there is very little chance that they would be able to do something about it while getting into office.<<<
While I will agree (especially after political activism since 1976), with the first part of your proclamation, the second part can be righteously challenged. Please watch this 7 min vid by Andy "petition" Jacobs of the Libertarian Revolution YT channel.
Now, to prevent the sheriff from garnering a monopoly over a WELL REGULATED MILITIA, the Oath Keepers have an interesting idea which would incorporate the structure offered by Volunteer Fire Departments, via the Search and Rescue division.
https://www.oathkeepers.org/cpt-community-preparedness-teams/security/