Nick Fury

A Marvel mainstay who's been haunting the pages of the House of Ideas since his Bronze Age debut in 1977, Nick Fury is one of those grizzled, indispensable presences who turns up wherever the stakes are highest. Introduced by David Kraft and Keith Giffen in The Defenders #51, he's spent nearly five decades keeping company with the absolute cream of Marvel's roster — Steve Rogers, Captain America, Thor Odinson, and Patsy Walker among them. His appearances span landmark series like Avengers, Captain America, and the visionary Earth X, marking him as a figure woven deep into Marvel's continuity across generations. If you're tracing the connective tissue of the Marvel Universe, Fury is exactly the kind of battle-worn character worth following.