issues hog
That one person who will claim they have every type of issue, making many conversations only about themselves without leaving room for others pain, emotions, thoughts and feelings. You might say one thing about (for example) your suffering depression, and you will be trapped in a 20 minute conversation with them about their battles and opinion on every mental health issue imaginable. Issues hogs will have very little consideration for you, can never offer a listening ear, only their own self absorbed anecdotes, due their narcissism and inflated sense of self.
Linda is such an issues hog- when I came to her for support when my mother died, all she did was moan about her own experiences when her mother passed away.