Dr. Leonard Samson

Brought to life in 1993 by the creative team of Peter David, Shana David, and Joe Quesada in X-Factor #87, Dr. Leonard Samson is a Marvel Copper/Modern Age figure whose nearly three decades of publication speak to a quietly enduring presence in the Marvel Universe. He moves in rarefied company — sharing pages with Bruce Banner, the Hulk, Iron Man, Tony Stark, and Ben Grimm — which tells you immediately that this is a character who orbits Marvel's heaviest hitters. His most frequent home across the catalog spans titles like Iron Man and Captain America, painting the picture of a professional whose expertise is sought wherever Marvel's most complicated figures collide. With a key issue to his name and 28 years of appearances, Dr. Leonard Samson is the kind of supporting player that true Marvel devotees know separates a real collection from a casual one.