Frank Talby is the main antagonist of the spaghetti western Day of Anger. Frank is a feared Gunfighter who seeks revenge for being betrayed and robbed by some Clifton citizens.
He was portrayed by the late Lee Van Cleef, who also played Angel Eyes.
Vote which fictional character would naturally fit in-universe with a big-named franchise! No time-travel, no interdimensional crap, no "Pooh's Adventures", they would just exist in-universe.