Late Beethoven Piano Sonatas

I am agree with Jorge err tha Polini's last sonotas are classic.

Schnabel is the gold standard. I also like Edwin Fischer very much. For opus 90 and 101, Richter on Praga is also great. For opus 106, Richter is incomparable on Stradivarius label (live recording from 1976).

I find Kempff to be dull, though his earlier mono recordings are less duller than his mind numbing stereo re-recordings.

Maurizio Polini for the last 5.

Kempf, Gulda, Backhaus, Gieseking, Solomon,Schnabel, Richter,Arrau,Casadesus.

i am surprised no one has mentioned Wilhelm Backhaus!!
his playing is one of the classic!
highly recommended.

You should definitely try Fritz Gulda for that!

Selectively taken, there are a few: Serkin, Gilels, Solomon (as Sugar above), Gulda...
Another set of performers comprises Brendel, Gould & Richter.

But as you like the Schnabel (I do too), I'm not sure what to recommend for a casual listen... maybe Serkin.

If you'll listen to historic, then Solomon on EMI Classics.
The 2 CD set includes Sonatas Nos 27-32.
Opus 90,101,106,109,110, and 111

I love Kempff, just haven't heard his late beethovens.

Kempff is always worth exploring in my opinion -- particularly in the late sonatas -- but Kempff does attract diametrically opposing opinions and I think you need to allow his interpretations to grow on you. His approach is to Beethoven is simplicity, lyricism, and inner power -- not everyone's view. Moravec's performance of Sonata 27 will reward your effort (Connoisseur Society label).