The
Liv Alight may meet your needs. Liv is a brand of Giant, and the Alight series is analagous to the Giant Escape. Trek also have a few
FX Stagger models that may meet your needs. Jamis also sells a
Coda Step-Over that may be suitable.
Another option is building something from scratch. Soma makes the
Buena Vista, a modern twist on the classic mixte frame.