Dick. Can't beat the original, IMO. It was great when he finally got a Nightwing ongoing, and then he ceased moving forward for decades.>>84623153
That seems like such a bad-end now. Especially after how much fantastic work Tomasi and Gleason have done to progress his character, with him becoming more sensitive and more responsible.
His last ongoing was all about him fearing that dark, killing side of himself and overcoming it.