Cracked by Ajay Parasuraman,Johny Walker,Rithwik.
ANSWER: The Joker.
Pic 1 and Pic 2: Bill Finger and Bob Kane credited with creating Him.
Pic 3: Red Hood ( Jokers persona before he became the Joker).
Pic 4: Joker’s image is said to have been inspired by Conrad Veidts character in ‘The Man who Laughs’.