I love the Beast and the Beauty. C:
I recommend The Greatest Love. The girl was not totally unattractive but she is the most hated girl in this drama by all the people. She was a former leader of a girl group but they were disbanded due to some reasons and she was blamed for all of it. Despite her bad reputation in the biz, she still work, guesting in different variety shows doing everything for her family. Anyway, the lead guy was a very popular actor but falls in love with the girl no matter how he tried to avoid it because of her bad reputation. I recommend this drama. It wil make your heart thump thump. C:
High School King of Savvy. The girl was totally unattractive from the beginning to end but the guy fell in love with him.
Flower Boy Next Door. The girl is PSH, obviously attractive irl but here she was hiding from the outside world. Her world is basically the four corners of her room.
Fated to Loved You. The girl isn't that unattractive, not attractive either. She wass just a plain girl that everyone ignored. And the people only needs her for some errands. Basically the post it girl. Korean and Taiwanese versions are beautiful in their own way.