What is the best sounding vinyl?

I've found IMPEX to be pretty good.  I have several.  And Three Blind Mice has good recordings of Japanese jazz.

 This is a question that cannot be answered. Too many variables across too many subjects. Sorry...

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As Jasonbourne71 has said, Sheffield direct-to-disc. I have several of those, ones I got back in 1988. They are exceedingly hard to beat. I have a Thelma Houston album on that label and it is spooky how "present" she seemed with WATT/Puppies from 1988. I can only imagine what she'd sound like with the electronics and speakers of today!

I've found IMPEX to be pretty good. I have several. And Three Blind Mice has good recordings of Japanese jazz.

Many folks at Impex came from Cisco, after the latter discontinued operations.  So, that is to say that old Cisco pressings are very good.  For example, the Cisco pressing of Aja is highly sought after.

I've also found that Living Stereo pressings are very good.

During the oil embargo in the early 70s, some record pressing plants used recycled, chipped-up vinyl from old records, which included bits of the center paper labels, so you can sometimes see tiny paper bits in the 'grooves' of records pressed during that time period.