K31
Blue Belt
The more clever among us will want to do something that is easy, safe and gets someone else to do the heavy lifting, someone who will not tire and will dedicate every single moment to destroying the threat. Carpet beetles. They're easy to raise. They will eat the zombies down to bare bone in an incredibly short time. They make more carpet beetles which will eat more zombies.
Well now if you're talking World War Z type zombies then their flesh is toxic so that might kill your carpet beetles.