It’s going to be really hard to beat the Krell S1200 because nobody uses discrete analog stages in processors anymore. Everything is op amp based (which can be good, but just doesn’t compare with the discrete Class A analog stages in the Krell). Also, the Krell has a very powerful high resolution sound.
You can go sideways and look for a Bryston SP3. It uses Class A discrete audio circuits both on the analog outputs as well as the fully balanced analog inputs with a "PURE PASS-THROUGH" mode where it does not convert analog to digital. Everything is converted to single-ended internally for volume control. It has probably the strongest bass I have heard out of a processor, but the rest of the sound is not as impactful as the Krell. Probably your best bet for a 2-channel solution. There is no EQ or room correction on this unit.
On everything else, I would look at units that have good linear power supplies. If you really want a Lyngdorf feature set, then look at a McIntosh MX-160/170/180. Those have the Lyngdorf digital/DSP section, but use all McIntosh power supplies and analog stages. Like others have said, if you want room correction, the processor is going to convert all analog input to digital for room correction DSP processing.