In order of recommendation:
Business Proposal (chaebol, talented woman) This is probably as close to King the Land; I'd say it surpasses it. I rarely rewatch, but I made an exception for this.
I'm Not a Robot (chaebol, struggling inventor) It's silly but sweet and fluffy.
You Are My Destiny (chaebol, poor woman) This has more melodrama than comedy than the others listed, but the acting is amazing.
Dating in the Kitchen (chaebol foodie, adept chef)
Cinderella and the Four Knights (rich men, poor woman)
Something about 1 Percent (arrogant chaebol, school teacher)
She Was Pretty (boss, employee)
My Secret Romance (chaebol, cook) Watch purely for the sexy vibes.
Good Job (chaebol, talented woman)