I have the following:
Wooden baseball bat - would not use - as i dont think you can do enough damage to the brain with just one blow, also they have a long swing arch
woodsmans axe - may use - very sharp but small cutting edge and long swing arch
parang - would use - very sharp, pointed for thrusting (even though it was not designed to it can do) can have either a long or short swing arch
crowbar - would use - great weight for size, claw can give good penetration either a long or short swing
2lb lump hammer - may use - despite it's weight i would have this in my hideout as it can be used for short periods of time and is heavy enough to crack a skull first time.