The best rock tones. EVER.

[cataract]

The band called Kent put out an album called Isola.
I'm jealous of the bassist's tone on this record.

Kent -If You Were Here (YouTube Link)

Also, this: Sunny Day Real Estate - Theo B. (YouTube Link)

[Planetsmasher]

You might like this then.. check out around 0:10

YouTube - SansAmp VT Bass Character Series pedal

[Tommygunn]

Geezer Butler. As far as clean bass tones go. His kinda thumpy p with flats always delivered.

[f'nar f'nar]

I think I post the same thing every time a thread like this comes up, but I can never go past the bass tone from Karnivool's latest album, it's got some SERIOUS testicles.

YouTube - Karnivool - Goliath

[powderfinger]

Entwistle.

[dougjwray]

Entwistle on "Who's Next."

Jack Bruce on anything before 1980 or so, when his sound got "modern" and clean.

McCartney on anything.

(This one's a bit more esoteric):
Mario Cippolina on "Heart and Soul" by Huey Lewis and the News"