There are a mix in comics. The good are superheroes the bad are supervillians. And some of them are in the grey. Batman doesn’t kill, but has no problem beating the shit out of henchman. Red hood killed people for good reasons, most of the time. He is sometimes a hero and sometimes a villain. Poison Ivy is a villain who often helps women and doesn’t hurt kids.

Also Deadpool. Just yeah, great guy who is an unrepentant killer.