All just my personal opinion
Beethoven: Piano Sonata No.22 in F major, op.54 — comparing recordings with the following artists: Wilhelm Backhaus (1969), Paul Badura-Skoda (1969), Daniel Barenboim (1984), Ronald Brautigam (2007), Friedrich Gulda (1967), Maurizio Pollini (2003), Artur Schnabel (1935)
Beethoven: Piano Sonata No.15 in D major, op.28, “Pastoral” — comparing recordings with the following artists: Wilhelm Backhaus (1961), Paul Badura-Skoda (1969), Daniel Barenboim (1984), Ronald Brautigam (2005), Emil Gilels (1982), Friedrich Gulda (1967), Artur Schnabel (1935)
Bedřich Smetana: Má Vlast — Harnoncourt, Vienna Philharmonics;
Dvořák: Symphonic Poems opp.107, 108, 109, & 110 — Harnoncourt, Royal Concertgebouw Orchestra
Telemann: 12 Fantasias for Flute — comparing recordings with the following artists: Barthold Kuijken (traverso), Dan Laurin (recorders), Leif Ramløv Svendsen (recorder), Maurice Steger (recorders), Dorothee Oberlinger (recorders), Héloïse Gaillard (recorders), Maxence Larrieu (Böhm flute), François Leleux (oboe), Kevin Thompson (euphonium)
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)