What if Mr. Darcy had fallen for another Bennet sister from the beginning? (Kyriakos, Kostas, Ermis)

If Mr. Darcy had fallen for another Bennet Sister, the whole plot of Pride and Prejudice would have been entirely different. For example, at the ball, the romantic rivalry between Mr. Darcy and Elizabeth would have never flourished. Elizabeth would continue searching for somebody rich to marry and love. So what would happen if Mr. Darcy had fallen in love with Jane?

If Mr. Darcy had fallen in love with Jane Bennet, the relationship between Jane and Mr. Bingley would have never happened. This would also alter the plot greatly, as Jane wouldn't get sick going to Bingley's mansion and she wouldn't stay over until she recovered. Also this change could create a relationship between Elizabeth and Mr. Bingley.