Here the only time new elders came in they were assigned, and they were decent men. Unfortunately they died young.
I knew 2 city slickers who moved south and took over, from what I know of them they were not bullies though.
There was an assembly experience where a family moved from California to small town Nebraska; they were not lonesome as they brought friends in too, so it became little kalifornia.
That latter experience is not limited to congregations. People flee Calif ( or wherever) bring inflated house money ey which runs local costs up, and then try to impose their attitude ( usually the reasons they left) on the whole community