So jerk male lead trope has been very popular since pretty much forever in the history of romance movies, dramas, shows, etc. But lately, it looks like the nice / cute / doesn't treat the girl like a possession male lead is becoming more and more popular instead of just being cast aside as the second lead who never gets the girl even though he treats her right. YAY!
Here's a list of dramas/movies/etc. with nice male leads. You can argue if you think something does not belong here or add on to the list:
A-Teen
Age of Youth
Accidentally in Love
Back to 20
Circle
Extraordinary You
Fight For My Way
Flower Boy Next Door
Healer
Ho Goo's Love
Hit the Top
Introverted Boss
Just One Bite
Kingdom
Lucky Romance
Miss Granny
My Beautiful Bride
My First First Love
Reply 1988
Sassy Go Go
Shopping King Louie
Strong Woman Do Bong Soon
The Beauty Inside (Movie)
Tunnel (Drama)
The Third Charm
Twenty Again
Weightlifting Fairy Kim Bok Joo
When The Camellia Blooms
When We Were Young (2018)
Witch's Romance
Looking for more ALWAYS. So feel free to add on so others can find recommendations.