Heracross is a specialis. It is used for its double-fight moveset with STAB and SE only.
It makes no sense to compare general DPS of other types movesets, there is no realistic scenario in which these numbers would make sense.
> Counter/CC: 28.819 DPS
SB/CC: 24.905 DPS
Counter/Megahorn: 28.439 DPS
By the way: 61.4215762 % of all statistics reflect an accuracy that is not justified by the data base.