I have to echo the others Trilian is the best bass vst I’ve heard. However ,also still a great altenative are the Scarbee basses. Unlike Trilian they’re very specific to one instrument.
You could basically buy Trilian and never look back as far as bass sound goes.
I just bought Scarbee Pre Bass and the damn thing sounds just like a real Precision bass! It can also be run in the free Kontakt Player, that’s good value for your money for sure.
Do you want a Beatlemania sound? Rubber Soul? Psychedelic Pepper/Revolver? White Album? Abbey Road?
Each bass sound is entirely different between the albums. More importantly the playing techniques are. And heck, even within the albums the bass is all completely different (“Back in the USSR”, vs. “While My Guitar Gently Weeps”, vs. “Martha My Dear”, all on the White Album, e.g.)!
So which sound do you want? He’s so versatile, it might be an impossible question!
I’ve heard of this radical new thing where people have pieces of wood with magnets attached and metal wires, and it’s plugged into a box which heats up, and after a while they can pluck the wires and sound comes out! I think it’s called something like “a bassist” or something like that … I have no idea where to get one though.
Funny, they call it a Hofner bass, and have three listening samples: Lady Madonna, Rain, Come Together. Thing is, I think he had given up the Hofner years before that, I could be wrong but I don’t think it was used on any of those songs.
He switched to a rickenbacker for most tracks on later albums but the hofner was still used and often his prefered guitar live. If its the riccy sound you’re after then scarbee’s rickenbacker bass VST is good.