Is it worth noting that all the 'named' bass players in your initial post, whilst being associated with one bass, will own numerous basses. Jaco had numerous Jazz basses as well as acoustics, 5strings etc. Sheehan has all sorts. Harris quite a few P-basses. Lemmy, not sure, but probably a bunch of Ricky's.
Marcus Miller has said stick to one bass and really get to know it so it's a part of you, which clearly he's done with his Jazz.......but he still has a bunch of basses including Foderas etc.
So....you know.....do what makes you happy
Si