I'm at the end of my rope and I'm going to threaten to get a person at work that's been bullying me fired.
That sounds drastic, is there another way to deal with the situation?
He's been bullying me and others at work and he won't stop.
If you're having trouble with an abusive co-worker, then you should report them to H.R. Ask the other people being bullied to make a statement as well and let HR handle it,
Human resources doesn't usually do much about these things, I need to speak to my boss about it.
It's good to report this behavior, but human resources should be notified and they will handle it in an appropriate manor. Ask you co-workers to report their experiences with this person and I'm sure the appropriate action will be taken.