Put this together back when I was watching My Secret Terrius 😛

Bad examples of a well done “stoic” male lead:
Radio Romance
My ID is Gangnam Beauty
Come Here and Hug Me

Good examples of a well done “stoic” male lead:
My Secret Terrius
Because This Life Is Our First
My Ajusshi (male & female lead)
Thirty But Seventeen (male lead for first half & Jennifer)