Some further thoughts, I see your Ps are historic reissues (plus an actual vintage '62?).
The purpose of those historic reissues (to me) is to get the most pure example of that type of instrument. I have a '57 AVRI Telecaster guitar that I bought specifically for it to not be a generic guitar — I wanted the pure old school twang sound and the same feel, modern improvements be damned, that old school Tele wranglers talk about when they wax rhapsodic about the joys of Teles. Specifically, it’s the opposite of an all 'rounder. It's great for certain things that just scream "Tele!", but for general rock music use, it absolutely wouldn’t be my first choice. Also, I find the vintage fretboard radius to be problematic. It does lend itself to digging into the strings a certain way, but overall it’s a deficit for me. If I wanted an all around guitar in a Tele shape, I d go for an American Standard (yeah, now just out of production) instead, or perhaps a model with one or two humbuckers. Perhaps one with a compound fretboard radius, but anyway, not vintage.
Okay, so P bass. You've gotten yourself a whole little collection of P basses, I believe more than the average Talk Basser has basses in total, of the various versions of the pure historic P basses of the 50s and 60s. And they’re not really doing it for you. Come to think of it, it seems like you could actually "trim the herd" rather than adding - keep a few examples that give something unique so that you have "that tone" when needed, but otherwise sell. Now, with money in hand, think about what you actually want from a P bass and also what’s missing from or bothering you about your P basses. As others have suggested, look at aspects like a PJ pickup config, neck width and I'd add, neck profile and fretboard radius. Look into different pickups to get the sound in your head too. Make a bass that's more of a generalist that you'd like to play all the time. While you're at it, give it a look you love, too — a specific look you don’t already have perhaps, or if you’re really all in, just your straight out favorite look. Beware, however, you just might create your new #1!
Or, just stick with the few historic examples so that you have "that sound" and/or look for the specific occasions that call for such, and otherwise be happy with your Thunderbirds and Jazzes.
Good luck — I’ve been wrestling a bit with kinda the opposite situation: I’m a P man who wants a J I'll really embrace while still having it be an actual J, but...and so on
and call it a day?
