you only have two things on your PTW list, neither of which has aired yet but between the two I would go with Along With The Gods 3

Mars, I highly recommend My ID is Gangnam Beauty, Her Private Life, and When We Were Young. 

Arthdal Chronicles part 1-3

Avengers social club

Battle of Changsha 

Prison Playbook

In a Good Way

Queen for Seven Days

Moon lovers : Scarlet Heart Ryeo

Goblin, Weightlifting fairy kim bok joo, He is psychometric, I hear your voice, Love in the moonlight, Healer, Romantic doctor teacher kim, Chicago typewriter, Hello monster, Shopping king loui, Bring it on ghost.

(Wow what a list! It is all filled with my favorites. Please start with the bold ones. I especially love them. I tried to rank the dramas according to how much I loved them. As for love in the moonlight, I would not say it is a quality drama but it was so lovely. For this reason it is bold, but in the 5th place.)

Imagine me without you

  • The Gifted
  • Strongest Deliveryman
  • Weightlifting Fairy Kim Bok Joo
  • My Mr. Mermaid

My Father is Strange   - loved this drama, 52 episodes  was not enough.

Sungkyunkwan Scandal, Arsenal Military Academy, Love in the Moonlight