I haven't watch Signal and Queen in Hyun's Man from the list so maybe I'll try. I agree with your choice except Ex-Girlfriend's Club, too much hole here and everywhere and they cut it to 12 episodes only.
Another recomendation: Hogu's Love, Emergency Couple, The K2, Marriage Not Dating!
So far I watched 9 episodes and it's enjoyable. Too sad this drama isn't gain more and more. I stopped and hold on 5th episodes but since the drama looked more intense, here I am watching this again.
the traffic laws exist in dramaland but it's just for the scene where the female lead and male lead going to meet in the middle of the cross road and the traffic laws blocked them haha.
Another recomendation: Hogu's Love, Emergency Couple, The K2, Marriage Not Dating!