Similarities :
+ Wuxia
+ Bickering couple
+ Hidden identity
+ Both are leaders
+ Both pairs are skilled fighters
+ Both pairs travel together
+ Solving a conspiracy/mystery
+ Beautifully choreographed fight scenes
+ Multiple random but not so random encounters between leads
+ Adapted from a novel

Similarities :
+ Bickering couple
+ Strong, smart, calm male lead
+ Strong, smart, (slightly) impulsive female lead
+ Dealing with politics
+ Investigation
+ ML falls first

Similarities :
+ Plastic surgery
+ Hidden identity
+ Fat to fit
+ Unrequited love
+ Beauty standards

Similarities :
+ Strong female leads
+ Female centered plot
+ Thriller
+ Drama
+ Mystery
+ Death
+ Infidelity
+ Hidden past
+ High society
+ Power struggle
If you're looking for a shorter --dare I say better-- version of Penthouse, Mine is a great option.