Best sounding transistors


Many people talk of tube rolling and the sonic differences they impart.  Output transistor are not easily rollable since they are soldered in place, but I'm curious about the sonic signatures different transistors might have.  Who makes the "best" ones?  Which amplifiers use them and what is the native/optimal output impedance on these devices?  I know there is a lot more to an amplifier than just the output transistors, but I'm just curious about this one aspect.  I'm not an electrical engineer either, so please keep it simple.  What do the Pass amps use?
thegoldengoose
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What a learning experience here - thank you for all the knowledge that you fellas bring!!!

mostly jfet but its not good on high frequency ,, people in usa or american always like jfet but most people in europe not like jfet because high frequency not quite good ,, the european more like high frequrncy than low frequency thats why speaker with very good high frequrncy like proac is very liked in there,,, anyway i have a question about transistor https://youtube.com/shorts/zRakw_KIfWI?feature=share anyone can help me?????????

So what happens to these Pass amps when an output fails and the NOS supply is depleted?

I believe this occurred with a Gamut model. Resale price plummeted.