X-Men: Legacy
Xavier battles Exodus on the psychic plane and triumphs by confronting his failures, then heads off on his own to try and become a better man.
After being shot in Messiah Complex, Xavier travels the world repairing his shattered mind and confronting the people he wronged. Carey writes the most honest examination of Xavier's failures since Morrison. The Sinister arc in particular reframes their entire relationship. Genuinely excellent character work that the larger franchise ignored
The title relaunches as X-Men: Legacy with a radical shift — Professor X, shot in the head during Messiah CompleX, wanders alone trying to rebuild his shattered mind. Carey deconstructs Xavier's entire history, forcing him to confront every compromise and manipulation