Magneto
What do you think about the enemy of the X-men known as 'Magneto'?
Magneto (real name unknown, alias Erik Magnus Lehnsherr) is a comic book fictional character, a mutant in the Marvel Comics universe. He has at various times been a supervillain, a superhero, and an anti-hero, and in his role as a villain - arguably his most famous role, though not his most complex - he is the primary antagonist of the X-Men. He was created by Stan Lee and Jack Kirby, though it was writer Chris Claremont who would later flesh out and develop the character into the one he is today.
Ref. Answers.com
Magneto is my favorite villain of all time! Magneto is wicked cool with the ability to manipulate magnetic fields to his liking. Magneto has two separate story lines revolving around him. One in which he is the master villain leading mutant kind to over throw humanity, facing off against Charles Xavier and his X-Men. The other is a separate reality created because of an early death of Charles Xavier. In that reality, he is the leader of the X-Men against the evil mutant Apocalypse.
Original Magneto Existence:
https://www.marveldirectory.com/individuals/m/magneto.htm
Alternate Marvel Reality Magneto:
https://www.marveldirectory.com/individuals/m/magnetoaoa.htm