Dramas where the main character starts out selfish but is forced to change and become more cooperative?

Coffee Prince - very adorable iteration of the selfish to cooperative theme.

Secret Garden - the G.O.A.T asshat CEO.

Good Manager - one of the funniest dramas I've ever seen. The ML starts out an embezzling crook who's only out for himself, but that irresistible Korean workplace team spirit catches on, and perhaps he's less callous than he seems to be?

Jealousy Incarnate - I have to be honest - the ML does become less egotistical, but it's not a complete reversal. The drama has some satirical views on human behavior.

Tomorrow with You - the ML has a time travel ability, but keeps all the benefits for himself, mystifying his employees with his unexplained success. He initially approaches the FL because he's concerned for his own future.

Dali and the Cocky Prince - starting out, the ML cares about one thing only: making more money. He's the creditor for a struggling museum, which the FL is trying to save.

Hyena - ML is a cutthroat lawyer. Fl is more cutthroat than a shark tank of lawyers. He falls first.

Love to Hate You - ML is an utter jerk. FL eats jerks for breakfast.

Something about 1 Percent - classic tsundere, grumpy vs. sunshine, classy romcom.

The Greatest Love - he's a big action star who is very loud and very self-absorbed. This is killer funny.