Another thing to try would be Acros, rated at box speed or a bit higher, developed in virtually any standard PQ/MQ developer. Rating it at box speed or higher will introduce more of a toe on the low end. The film naturally has very high highlight contrast, in fact higher contrast there than in the midtones. So combining all these elements you'd have a sort of upswept curve. It's a flat-grain film though, so it would never really look like Tri-X etc.