So many greats mentioned but given JJ and John Taylor have been done, otherwise for me, when I think of Rotosound, the bassist that comes to mind is Kris Novoselic. The tone and sustain is just pure Rotosound.
When I was a kid, I couldn't afford to get any of his amps or basses but I got a beat up Epi T-Bird (still regret losing that bass), a Rat and the exact same Rotosounds ❤️