Who is Harlan Granger?

Harlan Granger owns a ten-square-mile plantation which is worked by sharecropping families. The Logans' land had belonged to the Granger family before it was sold to a Northerner during Reconstruction, and Mr. Granger's desire to get it back from the Logans leads him to threaten Big Ma and to use his authority in town to pressure the bank to call in the note on the mortgage.