This excerpt from Tom Krause's homepage (written before his death) gives you an idea of his achievements as a singer:
Equally successful in the fields of opera, recital, oratorio and recording, Finnish baritone Tom Krause is internationally recognized as one of the greatest vocal artists today.
He is fluent in seven languages: English, German, French, Italian, Spanish, Swedish and Finnish. During a career spanning over fifty roles in the Italian, German, French, English, Finnish, Czech, Russian, and Swedish repertory including the Baroque, Classical, Romantic and Modern, Mr. Krause has performed in most of the great opera houses of the world. He has appeared in leading roles with Milan's La Scala; Teatro Colon, Buenos Aires; Berlin Opera; Vienna State Opera; Munich State Opera; Paris Operas (theatres Garnier and Bastille); Bruxelles Opera Monnaie; Finnish National Opera; Rome Opera; Naples' San Carlo Opera; Barcelona’s Teatro Liceo; Geneva Opera; Metropolitan Opera House; Lyric Opera of Chicago; San Francisco Opera and Houston Grand Opera, as well as with the festivals of Bayreuth, Salzburg, Edinburgh, Glyndebourne, Savonlinna, Tanglewood, etc.
A frequent guest soloist in concert, the baritone has been heard regularly with the Philadelphia Orchestra, New York Philharmonic, Chicago Symphony, Cleveland Orchestra, Boston Symphony, Los Angeles Philharmonic, Montreal Symphony, Berlin Philharmonic, Vienna Philharmonic, Orchestre National de France, Amsterdam Concertgebow, and others.
Mr. Krause has regularly shared the stage and recorded with such great singers as Placido Domingo, Luciano Pavarotti, Jessye Norman, Kiri Te Kanawa, Joan Sutherland, Birgit Nilsson, Marilyn Horne, Margeret Price, Teresa Berganza, and Nicolai Gedda, as well worked under the briliant conductors of our time, including Bernstein, Stravinsky, Solti, Von Karajan, Mehta, Ormandy, Shaw, Osawa, Rostropovich, Eschenbach, Conlon, Salonen, Harnoncourt and Giulini. He has worked with stage directors such as Ponnelle, Strehler, Faggioni, Sellars, Dresen, Everding, Lieberman, Menotti, and Chereau.
Listen to Tom Krause sing Schubert's Ständschen and Abschied: