Fire Marshall Bill
Let me show ya somethin!!!
Rocky 3? Rocky Balboa? Cinderella Man? The Fighter? Raging Bull? Creed?
I haven't seen the last 3 there, so sorry if that's confusing. The first 2 don't qualify as both Local competitor and hired muscle. The third doesn't qualify as hired muscle unless you want to stretch the term to include someone looking for any kind of work, to include manual labor. That's not how I meant it though. You're really close though.
It was supposed to be Rocky. I'll be more specific here.
Clue: Extremely OCD writer wreaking havoc with his neighbors after, among other things, throwing a dog down a garbage chute.