Ogres

The Ogre is a member of the Evil Queen's Council, such as The Witch, The Evil Elf, the Giant and more he gives her his hair, and is not happy about it.

The Ogre Wars
Also mentioned several times throughout the series are the "Ogre Wars", which is to assume that there are more than one Ogre and that they are at war with various kingdoms in Happily Ever After. In "Desperate Souls" Rumpelstiltskin is revealed to have fought in this war, before he became the Dark One, and even fled from battle. Veterans from the war refer to him as a coward and even as a traitor.

In "Skin Deep" Belle makes a deal with Rumpelstiltskin in an effort to save her village from the Ogre Wars. This shows that the war is obviously between more than one kingdom and the Ogres as well as the Ogre army being a very powerful force.

Many other villages are reported attacked and/or destroyed throughout the series by Ogre armies.