I would be jinchuriki of Jubi, 10 Tails just because I think it looks cool and demonic.

Matatabi because I like cats but kokuo seems calm so she would probably be a nice pick too

[Kurama. Because of the strength and his tsundere nature]

realistically, gyuki seems the most battle-anticipated and calm, kurama is a close contender, but i'd choose him off of strength alone. matatabi is too weak, and jubi is hell

Shukaku

Matatabi, I really like cats and it seems really chill.

Matatabi

[10 Tails is too much of a wild uncontrollable beast for me]

Ten tail just because it make u look cool