Though her characters are very different in the two series, this excellent (if sometimes slow) show was Jin Se Yeon's last sageuk role, for which she earned and received much praise.
While poor reedits on SBS's part make this one somewhat uneven, the core story is also a romance between young lovers who bond partly through their love of painting, and who are separated due to royal machinations.
By far the best sageuk of 2017 (in my opinion) this focuses primarily on the common and slave classes and the corruption of the royal and noble classes. While the plots have little similarity, they are both sageuks highly reminiscent of the recent golden age of sageuks in the mid-late 2000s.
While Park Shi Hoo's involvement is an understandable turnoff for many, The Princess Man is a classic "forbidden love" romance series by the same PD as Grand Prince.
Maids is written by the same writer and features a young woman whose legal status and romances are affected by the political world around her.