Ok, I went ahead and checked the ones you've already watch so I can recommend something you haven't seen yet:
1. Strong Woman Da Bong Soon | Everything about this drama is gold. The characters are adorable. The plot is amazing. The humor is maintained throughout. The chemistry is off the charts between the leads and the romance is even better. You have everything with this one. Humor, action, romance and some sprinkled drama.
2. Oh my Ghost(ess) | There's little to no misunderstandings in this one. Sure, FL does keep a secret from the ML for most of the series, but that's the heart of the story. It's a rom-com with a subplot of crime/action, so it just gets better and better with each episode. I think the summary for this one doesn't do it justice, so I'd advise giving it a shot even if the summary doesn't appeal to you.
3. Weightlifter Fairy Kim Bok Joo | This drama is cute and adorable. There's no misunderstanding between the leads. The cast is amazing, the chemistry is also spot on. This is a feel-good series. It's from the same writer as Strong Woman Da Bong Soon, but this one has less action and is, therefore, more lighthearted (slice of life).