Does every character in Naruto have a Tailed Beast? No.
Does almost every OC have one? Yes.
Not only do they have a Tailed Beast, sometimes they have more than one.
And without a doubt, the Tailed Beast is either Kurama, or a wolf.
And a 189,109,678 tailed wolf who has like 167,378.90 chakra natures they teach the young Marysue/Garystu.