Firestorm

Few characters carry a name with more weight in DC history than Firestorm, and this version — debuting in Action Comics #593 in 1987 under the pen of the legendary John Byrne — arrived right at the cusp of comics' Copper Age with serious pedigree baked in from day one. Over a remarkable 32-year publishing span stretching into 2019, this Firestorm carved out a place across titles like JLA, Firestorm, and Flash, rubbing shoulders with some of DC's absolute heaviest hitters — Superman, Wonder Woman, Green Lantern, The Flash, and Ronnie Raymond himself. With a key issue among their appearances and a presence that endured across multiple eras of DC storytelling, this is a character whose longevity speaks for itself. If you're building out a serious DC collection or just love discovering the layered history behind an iconic name, this Firestorm rewards the dig.