I loved My love from another Star! It's a bit different than the typical kdrama.
You said you already saw Heirs so I'll skip that one.
City Hunter I liked this and this one is actually from a manga. A bit different but oh well.
If your a fan of SHINee Minho then you'll enjoy To the Beautiful You. It's the Korean version of a, I believe, Chinese one. Which I can't remember the name of. I haven't watched the other two yet. So I can't give any info on them. Sorry.
I have only seen a few episodes of Strong Heart but I enjoy it. The Kpop or Kdrama or Kmovie or Comedians go on and tell a sincere heartfelt story about what has happened to them. Not sure if that is something you would like.
I haven't watched any of these except for Manny. It's alright the lead actresses character gets on my nerves though. The acting is alright. This was actually the first Kdrama I ever watched.
Also try Shut up Flower Boy Band. It has Infinite's L in it! He is fairly talented and working his way up in the business.
I recommend Coffee Shop Prince. It's funny and has romance. That's all for right now. Hope this helps. Enjoy the shows and or movies that you find. \^_^/