Jinchuuriki are allowed unless it's the Ichibi, the Kyuubi, the Hachibi, or the Nibi for they had Canon Charcters
List of Jinchuuriki:
Ichibi - Gaara
Nibi - Nii Yugito
Sanbi - Kabe-sama ((OC,Mizukage))
Yonbi - ???
Gobi - ???
Rokubi - ???
Shichibi - ???
Hachibi - Killer Bee
Kyuubi - Naruto Uzumaki