John Mayer / Kim Bong Goo From King 2 Hearts (2012) is by far best Villain I watched in Kdrama . Literally you don’t know what he will do from one minute to another
If you think that Double and Blossoms in Power have strong female leads you are wrong .Watch Story of Yanxi Palace…
Since you watched Yanxi I can recommend Blossoms in Adversity. It’s family drama with FL that takes over as head of family after all male members have been exiled . It’s great mix of everything business, romance , fighting and family relationships. Same actress from Lighter and Princess
Watch Story of Yanxi Palace if you want to see ultimate bad ass Female Lead Wei Ying Luo . She is a gold standard and it’s a same actress from Double