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
Beethoven: Variations on the Minuet “à la Viganò”, WoO 68 – Mikhail Pletnev (1997), Olli Mustonen (1995), Ronald Brautigam (2011); Mendelssohn-Bartholdy: Organ Sonatas op.65 — Heinrich Gurtner (1989), Stefan Schättin (1995)
Beethoven: Pathétique & Moonlight — Backhaus, Barenboim, Badura-Skoda, Brautigam, Fischer, Gilels, Gulda, Immerseel, Pletnev, Schnabel
Beethoven: 6 Bagatelles, op.126 — Ashkenazy (1984), Brautigam (2010), Brendel (1964 & 1985), Gould (1974), Schnabel (1937); Beethoven: 24 Variations on the Arietta “Venni Amore” by Vincenzo Righini, WoO 65 — Pletnev (1997), Brautigam (2012); Schubert: Symphony in B minor, D.759 (“Unfinished”) / Symphony in C major, D.944 (“Great C major”) —Furtwängler (1952), Harnoncourt (1992), Dausgaard (2006)