Monsieur Le Roux has appeared at Glyndebourne as Ramiro in Ravel's L'Heure Espagnole, in Hamburg and Oslo as Marcello in La Bohême, in Frankfurt as Orestes in Gluck's Iphigénie en Tauride, at the Royal Opera House, Covent Garden, as Lescaut in Massenet's Manon, as Papageno in Mozart's Magic Flute conducted by Colin Davis, and as Figaro in Rossini's Barbiere di Siviglia.
In 1988 he made his debut as Valentin in Gounod's Faust at the Paris Opéra. The role of Don Giovanni played on the same stage enjoyed a real triumph and brought him the French critics' Prix de la Révélation de l'Année. As Don Giovanni, Le Roux has also appeared in Zürich under Harnoncourt, and also in England.
In 1985 he sang Pelléas in Debussy's Pelléas et Mélisande for the first time and at once was described by the critics as 'the greatest Pelléas since Jacques Jansen'. He has now sung the role over a hundred times on the most renowned operatic stages of the world.
His wide repertoire covers all of the Mozart baritone parts, many roles from the Italian repertoire (Figaro, Dandini, Malatesta, Marcello), and baroque opera (Campra's Tancrède title role and Rameau's Pollux in Castor et Pollux at Aix-en-Provence) as well as contemporary opera (Henze's Der Prinz von Homburg in Munich under Sawallisch, and world premieres of Birtwistle's Gawain at Covent Garden and Von Bose's Die Leiden des jungen Werthers at the Schwetzingen Festival).
Other operatic appearances have included La Cenerentola (Rossini) and Romeo et Juliette (Gounod) at Covent Garden, Pelléas at the Los Angeles Opera and Venice's La Fenice, Der Prinz von Homburg with De Vlaamse Opera, and David Lang's new opera Modern Painters at Santa Fe. Concert performances have included Pelléas with the Orchestre National de France under Dutoit and recitals in Paris, Cologne, New York and London.
In addition to many operatic recordings, Le Roux has made several records of French song for French labels which have been enthusiastically received, gaining him a reputation as Gérard Souzay's successor. His record Fables de La Fontaine received the French Record Academy Award.
Monsieur Le Roux gives numerous recitals with such renowned accompanists as Irwin Gage, Roger Vignoles, Jeff Cohen and now Graham Johnson, and he also gives masterclasses dedicated to the interpretation of French song. He is the winner of international competitions in Barcelona ('Maria Canals') and Rio de Janeiro.