Another question already asked about weapon damage per second (DPS; damage per hit and 'reload time'). The accepted answer basically states that "they are different in terms of reload time, however, they are not different in terms of damage done per hit."
I'm curious about how melee weapons compare to each other in terms of swing arc and reach, as this is another significant factor in melee weapon choice, aside from 'reload time'. Is there a ranking of melee weapons in terms of swing arc or reach?
The Left 4 Dead Wiki doesn't seem to go into detail about this part of the melee weapons' stats.