Definitely Empress Ki. There is romance, eye candy, and lots of teary moments (I think I cried in every two episodes). There is a lot of shipping to do (don't worry about your otp!) and really, it's just the best drama ever. It's as dramatic, well-made, and long as Jewel in the Palace, and makes you super emotional.
I loved jewel in the palace so trust me, Empress ki is just as good!
Also, Dong yi also have the same vibe (and it's so good!) There's a chinese drama that is also super epic and makes you cry everyday: Empresses in the Palace. I highly recommend it!