I have found the following labels to have provided excellent sounding classical recordings on LP with a high degree of consistency, although unfortunately a number of them no longer exist or no longer produce LPs.
Accent
Astrée
Audiofon
Chesky
Dorian
Harmonia Mundi France
Harmonia Mundi USA
Hyperion
Lyrinx
M&K Realtime
North Star
Pierre Verany
Proprius
Reference Recordings
Sheffield Labs
Syrinx
Valois
Wilson Audio
For small scale classical music I would particularly single out pretty much anything on the Harmonia Mundi labels (also recommended above by @bdp24 ), and (if you can find them, perhaps on eBay) the Astrée LPs released during the 1970s and 1980s featuring Paul Badura-Skoda performing on an early 19th century fortepiano. The latter are simply amazing.
Regards,
-- Al
Accent
Astrée
Audiofon
Chesky
Dorian
Harmonia Mundi France
Harmonia Mundi USA
Hyperion
Lyrinx
M&K Realtime
North Star
Pierre Verany
Proprius
Reference Recordings
Sheffield Labs
Syrinx
Valois
Wilson Audio
For small scale classical music I would particularly single out pretty much anything on the Harmonia Mundi labels (also recommended above by @bdp24 ), and (if you can find them, perhaps on eBay) the Astrée LPs released during the 1970s and 1980s featuring Paul Badura-Skoda performing on an early 19th century fortepiano. The latter are simply amazing.
Regards,
-- Al