All just my personal opinion
Dmitri Shostakovich, Preludes & Fugues op.87: comparison, recordings by Tatiana Nikolayeva (1962), Boris Petrushansky (1992/92), Vladimir Ashkenazy (1998), Konstantin Scherbakov (1999), and Alexander Melnikov (2009)
Bach: 6 Partitas BWV 825 – 830 — comparing recordings with the following artists: Walter Gieseking (1950), Glenn Gould (1962), Andreas Staier (1993), Gustav Leonhardt (1986), Christophe Rousset (1992)
Bach: Italian Concerto in F major, BWV 971 — Walter Gieseking (1940), Wanda Landowska (1933), Gustav Leonhardt (1965), Andreas Staier (1993), Ton Koopman (1986), Christophe Rousset (1990);
Bach: Partita in B minor, BWV 831, “French Overture” — Walter Gieseking (1950), Glenn Gould (1970), Christophe Rousset (1990), Andreas Staier (1993)
Beethoven, “Eroica”-Variations op.35, Comparing recordings with the following artists: Artur Schnabel (1938), Glenn Gould (1970), Svjatoslav Richter (1970), Emil Gilels (1980), Konstantin Scherbakov (1984), Alfred Brendel (1985), Olli Mustonen (1993), Ronald Brautigam (2010)
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)