Dr Abraham Cornelius
A shadowy figure lurking at the edges of one of the Modern Age's boldest reimaginings, Dr. Abraham Cornelius made his mark in the pages of Ultimate X-Men when Mark Millar and Andy Kubert were tearing apart and rebuilding the X-Men mythos from the ground up in 2001. His catalog footprint is small but pointed — four appearances in a world populated by the likes of Logan, Ororo Munroe, Bobby Drake, and Peter Raspoutine, with the enigmatic Colonel John Wraith never far from the shadows either. Characters like Cornelius tend to exist at the intersection of science and moral ambiguity, and in the Ultimate universe that made for some genuinely unsettling company. A niche find for the dedicated Ultimate completist, he's a reminder that even supporting players in a landmark run carry real weight.