Who is Dirk Courtney from A Sparrow Falls and what is their importance?

Dirk Courtney is a large man with wide and powerful shoulders, Dirk Courtney has a strong chin, and perfect white teeth inside a wide and determined mouth. His eyes are dark and intelligent, and he radiates strength. Ruled by greed, Dirk bought his way into the Ladyburg Farmers Bank by making Ronald Pye a deal he could not refuse.