Cutting Amplifiers

So really you are asking about the mastering process and the mastering engineers. Analogue Productions; Kevin Gray; Sterling Sound; Bernie Grundman; Doug Sax; Bill Schnee - just off the top of my head. For any remaster, I ALWAYS look to see who did the mastering - the above are all excellent IMHO.

If you like classical, I HIGHLY recommend the Original Source series from DG. EXCELLENT sound/enginnering/mastering.

https://trackingangle.com/features/producing-mixing-mastering-the-new-dgg-original-source-series-bruckner-complete-9-symphonies-box

@atmasphere +1

off the top of my head...add to the list:

 ERC vinyl (from England) 

Stan Ricker from MoFi (he also mastered many early Windham Hill LPs at 1/2 speed) 

TACET

Vacuum Tube Logic (VTL)

Harmonia Mundi (I expect...)

of course, many labels had some all-Analogue LPs, as well as Analogue/Digital mastered LPs. (ex. MoFi)

Anything Keith Johnson produces is delightful. 
At least the recording is.