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

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.

to me best  is bd 139  as output transistor  ,, you not bekieve , do you ? yes , i dont believe it too like you at first time  ,, coupling  with ef2  it sound delicious , yummy  , i cant bekieve the sound is very open ,, i can easyly hear the difference between cd player , turntable , and speaker  ,,, wow this is amazing   ,,  anyway help me please with this transiator  https://youtube.com/shorts/zRakw_KIfWI?feature=share  thanks  a lot for who had answer!