I recommend the kdramas "Black Out" and "Good Partner". Black Out is adapted from a German novel but given its Korean spin and great acting, it is worth watching. Both of them will be a change from the ones you have reacted to. Enjoy!
If you loved Business Proposal I am suggesting you my two favorite shows 1. What's Wrong With Secretary Kim 2. King's Land Both are 10/10 (Comedy + Full On Romance + Happy Ending)