jack The Ripper has cache because he was never caught and he went out in the London mist like a goddamn vampire. The imagery surrounding this cat is powerful, running around the streets of london in a top hat and coat (even if he didn't wear that) and slicing bitches.
Same with Zodiac. Nicca merced fools wearing that funny ass outfit. He's memorable. Richard Ramirez was a scary motherfucker but nothing about him was cool on a visual level. He was just a beaner that climbed through windows. Also Ramirez idolized Jack The Ripper and liked to go out when it was misty and ice fools.
I used to read up on serial killers, knew about a ton of them. I don't fuck with that shit anymore tho. Its poison to the mind and makes me feel sick just to think about that shit. Such demons.