Yagura and was under the control of Obito's Sharingan. The only 3 perfect Jinchuurikis are Bee,Naruto, and Minato. Manga is proof enough. Uzumaki's and Edo Tensei Minato being the only ones to be able to handle the Bijuu being sealed in them is proof enough. Mito had it first, then they had to get someone else (Kushina), who had the ability to be able to survive it, her special chakra was why she was the only one compatible. Why look into another village, if there were Senju and Uchihas that could handle it. They didn't cause there wasn't any. It was not circumstance nor can you name a single uchiha or senju (other then Hashirama) that could handle having the Kyuubi sealed in them.