Any dramas where one or more characters have a believable redemption arc?

On your Dropped list: Pinocchio - if you're interested in giving it a second chance, it has redemption as a central theme. There are two complex, essential characters (one of the main characters, and one a supporting role) that have lengthy, multiple steps, high stakes redemption arcs. There's another very present supporting character who's showcased as incapable of seeking redemption. I see we share an appreciation for Healer, and I'll say that Pinocchio shares not only its year, but also its scale and complexity. However, I don't see any other Lee Jong Suk dramas on your completed list. So if you don't have performer chemistry with Lee Jong Suk, I'm not sure if it's for you. To be sure, Pinocchio has a large and multi-faceted ensemble, but Lee Jong Suk's and Park Shin Hye's characters are central.

Come and Hug Me - ML is the son of a murderer. He dedicates his life to atonement for his deceased father's sins.

Secret Love Affair - FL sold out many years ago, but finds a reason to reclaim her soul.

Hide - Has redemption - wait for it. Most episodes are dedicated to a twisty game of cat and mouse.

Tomorrow - The female lead's redemption arc comes up in later episodes.