I’ suggest winter rye. It is fast growing, will control erosion and help buid the soil when turned under in the spring. It can be sown as soon as the crops are finished. It can germinate in coll weather so late September/early October seedings are possible. Winter rye will green up early in spring and can help get the soil dry enough to till a bit earlier. Winter rye can get tall in spring so it may need to be mowed down before getting turned under in spring.