Dionysus

Bacchus is the Olympian God of parties and merriment, and a son of Zeus. He is voiced by Dom DeLuise.

Hercules (film)
Bacchus plays a very minor role in the film usually only appearing in cameos.

During the beginning of the film he is present for the party celebrating Zeus and Hera's newborn son Hercules. Eighteen years later Hades unleashes the Titans on Mount Olympus and imprisons all the Gods including Bacchus. Luckily they are all saved by Hercules. Near the end of the film he is seen celebrating Hercules arrival after having gained his Godhood, but when Hercules decides to live as a mortal on Earth with Megara, Bacchus still celebrates Hercules' decision and even opens a bottle of wine in celebration of the new couple.

Hercules (animated series)
Bacchus plays a much more larger role in the series and even acts as the main force behind the plot in one episode.

Hercules and the Bacchanal
In this episode Hercules asks Bacchus if he can liven up things at his party which is being held at Phil's Island, to which he full-heartedly agrees. The party eventually gets out of control when Bacchus begins destroying some of Phil's belongings.

Hercules and the Golden Touch
After Midas, the king of Phrygia did an act of kindness for a friend Bacchus rewarded him by granting him the ability to turn anything he touches into gold. This however turned the king into a mad and greedy king whose lust for gold made him create a plot to turn the whole world into gold by using Hercules' connection with the Gods to steal Hermes' magic shoes so he could turn the world to gold in faster time, but after he accidentally touched his daughter and turned her into gold he realized the error of his ways and prayed to Bacchus to rid him of his curse which he did.