Black has appeared in more than forty comics, as well as in various other media (such as television shows, animated movies and video games - which this poster likes to refer to in terms of popularity), ranging from his first appearance in 2001 to the New 52 continuity.
His psionic feats put him right up there with the very best (non-cosmic or creator being) psionic characters in comic books.
Telepathically, he has controlled Superman's entire rogue gallery and switched the minds of pairs of characters into each other's bodies. Telekinentically, he has induced a stroke in Supes by pinching his extremely durable brain arteries very intricately, and he can erect powerful TK shields and project powerful concussive TK blasts.
He hasn't always been presented with powers, as Superman did depower him, but his feats and number of appearances can't really be disputed. And he'd absolutely, unquestionably defeat a fairly sizeable chunk of the list of characters at the start of this thread.