All just my personal opinion
Comparing recordings with the following artists: Casals/Schulhof (1930), Fournier/Schnabel (1947), Fournier/Gulda (1959), Fournier/Kempff (1965), Harrell/Ashkenazy (1987), Isserlis/Levin (2012), Maisky/Argerich (1993), Perényi/Schiff (2004),
Queyras/Melnikov (2013), Rostropovich/Richter (1961), Wispelwey/Komen (1991), Wispelwey/Lazić (2004)
Chopin: Piano Concerto in E minor, op.11 — comparing recordings with the following artists: Argerich/Abbado (1967), Askenase/Otterloo (1960), Avdeeva/Wit (2010), Avdeeva/Brüggen (2012), Rubinstein/Barbirolli (1937), Rubinstein/Wallenstein (1953), Rubinstein/Skrowaczewski (1961)
Der Ring des Nibelungen, part 4 — comparing 2 recordings: Furtwängler (1953, Rome), with Suthaus, Mödl, Greindl, Poell, Jurinac, Klose, Pernerstorfer, etc.; Janowski (1980), with Kollo, Altmeyer, Salminen, Nöcken, Sharp, Wenkel, Nimsgern, etc.
Der Ring des Nibelungen, part 3 — comparing 2 recordings: Furtwängler (1953, Rome), with Suthaus, Patzak, Frantz, Greindl, Klose, Streich, Mödl, etc.; Janowski (1980), with Kollo, Schreier, Adam, Nimsgern, Salminen, Wenkel, Sharp, Altmeyer etc.
Der Ring des Nibelungen, part 2 — comparing 2 recordings: Furtwängler (1953, Rome), with Frantz, Mödl, Windgassen, Frick, Konetzni, etc.; Janowski (1980), with Adam, Minton, Altmeyer, Jerusalem, Norman, Moll, etc.