All just my personal opinion
Beethoven: Piano Sonatas — summary for comparisons of recordings, involving the following artists: Wilhelm Backhaus, Paul Badura-Skoda, Daniel Barenboim, Ronald Brautigam, Edwin Fischer, Emil Gilels, Friedrich Gulda, Clara Haskil, Jos van Immerseel, Julius Katchen, Wilhelm Kempff, Igor Levit, Mikhail Pletnev, Maurizio Pollini, Svjatoslav Richter, Arthur Rubinstein, András Schiff, Artur Schnabel, Mélodie Zhao
Comparing recordings with the following artists: Géza Anda, Camerata Academica (1962) / Vladimir Ashkenazy, Philharmonia Orchestra (1978) / Daniel Barenboim, English Chamber Orchestra (1971), Kristian Bezuidenhout, Petra Müllejans, Freiburger Barockorchester (2012)
Beethoven, Piano Sonata No.8 in C minor, op.13, “Pathétique” — Backhaus (1958), Barenboim (1984), Badura-Skoda (1969), Schnabel (1935), Fischer (1952), Gulda (1967), Immerseel (1983), fortepiano), Gilels (1980), Brautigam (2003, fortepiano); Piano Sonata No.14 in C♯ minor, op.27/2 — Badura-Skoda (1969), Barenboim (1984), Backhaus (1958), Gulda (1967), Schnabel (1935), Pletnev (1988), Gilels (1980), Immerseel (1983), fortepiano), Brautigam (2003, fortepiano)