>>27745972>Just harm and leaveYou're lookin' for Less Than Lethal: As you said, pepper spray would be good. There's some fancy stuff out there now that also coats them in invisible ink, so you can help them be apprehended.
I don't know the proper terms for each, but consider shock-tools as well. Stun-guns have a dead-zone where they aren't effective, and inside that range is where you'd use the other one; it doesn't shoot prongs like a taser, so you just hold it against the person.
I'd also suggest becoming a GAU-8, or just taking some self defense classes if that's more feasible for you.