Since you asked for Taiwanese, here are a few that kind of fit your good guy description. I didn't look through the other recommendations, so there might be some overlap.

In Time With You
Hi My Sweetheart
Hot Shot
Inborn Pair
In a Good Way
You Who Came From the Stars
Prime Minister and I
The Girl Who Sees Scents
Yong Pal
Flower boy next door is my all time favorite drama. and Enrique is adorable. Soon Shi Yoon is just as sweet in real life. 
Kimi ni Todoke - it's a Japanese movie. If you're into anime it's even better, the guy in this is sooo sweet and kind to a very misunderstood female lead.
I just completed Shopping King Louis and he is soo sweet and pure from start to end
weightlifting fairy kim bok joo! PLSSS just watch it! there's no bad guy 
I just finished Boku, Unmei no Hito desu, and the main love interest is honest, adorable and nice!
Shopping King Louis
Weightlifting Fairy Kim Bok Joo
Strong Woman Do Bong Soon
Healer