Hi Dani 

There are a couple of others that come to mind, namely 


I need Romance 3
City Hall
The Greatest Love
Witch's Romance
Secret Love Affair (When they play the piano together it's amazing. May be not everybody's cup of tea and no rom-com, but I loved it.) 
Kimi Wa Petto
Heart to Heart
Marriage not Dating
Que Sera Sera

I also need to mention 'Cruel City', because although it is not a romance drama it has one if not the best kiss scene of any k-drama I have ever seen, 

Enjoy, Luna
Marriage not Dating was awesome, recently finished it and the ending is very satisfying.... I wish there would be more episodes tbh =w= The love triangle is annoying though

Goong is awesome as well, at the beginning they are the exact opposite of affectionate but give it some time... it's really good^^'
u already got so many lol ..... just adding onemore to ur list
operation proposal ................ its my fav love drama n plus its time travel ....... i dont know why not many rec it
Oh My Ghostess, Me Too Flower
Wahhhhh I didn't expect to get this man recommendations, thank you!