Which of these leads would you be most excited to see star in a drama together?

Ji Chang Wook + IU

I love IU, she's like the best singer and actress ever. She also picks really good scripts where the FL isn't a tool. I went through a  JI Chang Wook binge-watching phase because he's just that good. I would love to see them in an action/romance drama.

Kim Soo Hyun + Park Shin Hye

Just 2 icons that I would love to see. They would be good in something thriller/mysterious? Romance would be nice too.