The Good Place. It starts off deceptively shallow but by the end it became one of my favorite shows of all time.

Dark. The constant time travel makes it hard to keep track of what’s going on a lot of the time but if you can manage, it’s very rewarding. Great character development. Not the best ending, but good enough.

Better Call Saul and Breaking Bad have some poorly written characters but the well-written ones are very well-written.

I didn’t include any shows based on books because I felt that would go against the scope of your question.