Professor X

Few characters in Marvel history carry the weight — and the legacy — of Professor X, who stepped onto the Silver Age stage in the very first issue of The X-Men in 1963, conjured into existence by the legendary partnership of Stan Lee and Jack Kirby. As the founder of the X-Men, he has stood at the moral and philosophical heart of one of comics' most enduring franchises for over six decades, racking up an extraordinary 1,312 catalog appearances across The Uncanny X-Men, The X-Men, and beyond. With 99 key issues to his name, he is practically a road map of Marvel history — sharing pivotal pages with icons like Cyclops, Jean Grey, and Wolverine across storylines that have defined generations of readers. If you're serious about Marvel, Professor X isn't just worth knowing — he's essential.