Trap guy in the bar used to be mega OP way back when, but blade traps are more expensive, and harder to build now.
I eventually had a row of blade traps backed by turrets, with walls built partly around them to prevent them shooting me or each other, because they would gladly do so at the time. I don’t know what my record for kill count was back then, I dropped so many the game crashed after several hours. This was before zombies would get back up, too.