6. Henry McCoy (Beast)
Dr. Henry “Hank” McCoy, better known as the “Beast,” is Marvel’s preeminent authority in genetics and evolutionary biology. His expertise has been vital to the X-Men, supplying scientific solutions to mutant challenges and medical emergencies. McCoy’s research has often bridged understanding between humans and mutants, promoting coexistence through knowledge and compassion. His intellect and empathy make him indispensable to both the X-Men and the wider Marvel Universe.