Do you mean, I can choose any one impedance arbitrarily from this impedance region which may be close to all those impedances.
By the way, my teacher mentioned that I can extract real and imaginary parts from the impedances and then find polynomial from them using curve fitting. With the help of polynomial, I can find one impedance with which I can do matching. I am not sure what this method is and how it is called. I am actually searching for this procedure.