Try a bongo if you want to hear a wide range of tones.
But that's not the point. I can name at least a dozen basses from a dozen companies that have a dozen knobs and a hundred dozen different sounds coming from those knobs. And again, there is nothing wrong with that. I've owned many of them. In fact, I've owned around five hundred basses over my lifetime, from cheapies to $5000 plus boutique basses. From Music Man, the Reflex wins (in my book) for the "I can sound like anything" bass design. Obviously there are many basses that have wide variations of electronic-induced tones beyond that of the Stingray. All I'm really getting at is that the Stingray can (and does) do more than it is typically given credit for--which is the tired old cliché... bright, aggressive "slap sound" (which is a good sound but not one that the Stingray should be boxed into exclusively).
I'm at a point in my playing that I want sufficient versatility, but at the same time, absolute simplicity as far as knobs on the bass and onboard preamps. The Stingray fits the bill for me better than other basses--it doesn't get much simpler than a volume, low, and high knob, other than a straight passive volume & tone setup, like a P-bass. I'll admit I'm a bit biased because the "Stingray tone" is probably my favorite, overall. Yeah, I like Louis Johnson, Bernard Edwards, so on... and my favorite bassist is Paul Denman. He plays a stingray most of the time, but most folks would never guess just by hearing his ultra-smooth tone.
I've gotten to the point that I rely on attack, plucking position/technique, and simple volume/tone adjustments more than the way I used to do it with heavy-duty boutique preamps in the basses, pedals, compressors, graphic EQs, parametric EQs, blah blah blah... I don't even own any of that stuff any more. My goal these days is to be versatile enough for the style of music I'm playing at any given time and sound good, but to also keep the controls to at most what the Stingray has... volume, bass, treble. My other main bass is an early 50's style (F****r custom shop) P-bass. That bass can do more than it's given credit for too, besides straight up slap/finger funk or metalish sorts of aggressive stuff--it has too soft an attack for that to sound really good. But, the Stingray on the other hand... well I can make it work and sound good for anything that I'm able to play and interested in playing in a band setting.
So, back to the original thought... down with putting the Stingray in a pigeonhole!!!