Giacomo Conterno Monfortino, Masseto, Aldo Conterno Granbussia, Giacosa Collina Rionda, Gaja Sori San Lorenzo and Sori Tilden, Biondi Santi Riserva, Poggio di Sotto Riserva, Stella di Campalto Riserva, Soldera Riserva, Giuseppe Rinaldo Barolo, Giuseppe Mascarello Monprivato Riserva, Bartolo Mascarello Barolo, Cappellano Barolo, Burlotto Monvigliero, Avignonesi Occhio di Pernice, Biserno Lodovico, Tenuta San Guido Sassicaia, Montevertine Le Pergole Torte, Antinori Solaia, San Giusto a Rentennano La Ricolma, Ornellaia, Le Macchiole Messorio, Quintarelli Amarone, Dal Forno Amarone…
Sadly a list with too many wines I have not yet had, and almost purely the most expensive wines of Italy.
If you are looking for undervalued… It is worth a go at almost anything you never heard of from the 1950s-70s in Piedmont. Seek out 1958, 1961, 1964, 1967, 1971, 1978. Trust the vendor and take a shot. You could be blown away by something less than 25% of the cost of the list above.
Also, San Giusto a Rentennano Percarlo, Isole e Olena Cepparello, Cavallotto Bricco Boschis, Castello di Ama L’Apparita, Conterno Fantino Sori Ginestra, Produttori del Barbaresco (Pora, Rabaja…), Fuligni Brunello & Riserva, Mastrojanni Brunello Vigna Loreto… all undervalued imo, though Percarlo’s price is climbing quickly.