You've probably already seen this, but a favorite drama of mine that's about revenge is The Glory. The FL was bullied throughout high school, and dedicates her life to getting revenge on them. It's probably a little more on the "thriller" side than you're looking for, but I'm typically not into this type of genre, and I loved it.
Another drama that has revenge is Revenge Note (Season 2) - This one, the FL doesn't really act herself to get revenge, but the phone does it for her? Kind of confusing. But it's good, and the people that hurt her get what's coming for them. There is also a first season to this. But you don't need to watch the first season to understand the second.
