This is a bit like asking people to tell you what you're favorite color should be. No one can tell you what you will like as much as YOU. Especially when dealing with 4 choices and having 3 be so completely unique (Jazz and Jag sound almost identical). I will however give you my favorites in your list, in order of my preference.
1) Jazz
2) Precision
3) Stingray
4) Jaguar
IMO, as long as we are talking MIA Fenders, the Jaguar doesn't really belong in your list. Every MIA Jazz I've ever played beats out every Jaguar I've played. If you have the money to go MIA, I would get an MIA Jazz. The P is just a great everyday bass. It doesn't do much in the way of versatility, but what it does works for so many situations. The Ray is, well the Ray. You could say the same thing about the Ray as I said about the P-bass. Not the most versatile, but the tones it does have are wondeful and work in many contexts, arguable even more than the P-bass. They are a bit sproingy for my taste, but they are wonderful instruments. So, in essence, the Jazz, being the tone I prefer and the most versatile of the group, would be my choice. Hope that helps.