One character that appears on the show wasn't technically a character from the comics, but he was heavily influenced by one.
It wasn't until he met and married a woman named Mary that he joined the Mennonite faith -- crediting Mary to saving him.
However, when Rhodey died, Nick Fury allowed Frank Castle to steal the War Machine armor, giving the Punisher a new weapon and giving Fury plausible deniability when he pointed that weapon at a hostile nation perpetrating genocide.
This is when the biggest change occurs between Pilgrim and Mennonite in that Frank decides to help Pilgrim return to his peaceful life.
The Punisher's psychotic obsession with vengeance and his own brand of justice are not only unfit for Marvel's current publishing line, but also unlikely to appeal to readers outside of those same groups who are criticizing the new direction hinted for the character.
This is one of the most disturbing weapons Punisher ever used.