Heracross + Bulky water should work out fine. Slowbro can T-Wave so Heracross can come in and Horn-Rape the rest of your team.
In the entire UU Tier, the standard sets of every single pokemon of bar Altaria, Nidoqueen, Defensive Qwilfish, and Weezing are guaranteed to be OHKO'ed by one of Jolly Heracross's STAB moves after single Swords Dance. Moltres is the only one that requires stealth Rock to be OHKO'ed. 252/40 Altaria takes a minimum 97% damage after SR and is OHKO'ed on average. 252/252 Bold Weezing is 2HKO'ed on average. Qwilfish is 2HKO'ed 100% of the time. Nidoqueen is always 2HKO'ed.
This means that Heracross has no safe switch ins. Either your so called "wall" will be eating a Banded STAB attack or cowering in fear as Heracross uses Swords Dance. This means that Heracross has no counters, and teams must rely solely of checks. All of these checks are faster than Heracross. Due to this fact, Heracross could opt to run a Sub/SalacSwarm SD set. This gives him the ability to bypass faster pokemon, but he can no longer absorb status. Other wise Dugtrio, Milotic, and Registeel pretty much handle all the pokemon who will attempt to revenge Heracross.
I honestly don't see anything stopping Heracross. I think he will get an early boot.