In 1953, he appeared at the Teatro Comunale Florence as Count Rostov and Field-Marshal Kutuzov in the near-complete Italian-language premiere of Prokofiev's War and Peace.
In 1957, he replaced Ezio Pinza in the role of Emile de Becque in the musical South Pacific on Broadway, later also appearing in Kiss Me, Kate.
Tajo made relatively few recordings, the most famous being the acclaimed 1950 RCA Victor Rigoletto, with Leonard Warren, Erna Berger and Jan Peerce, conducted by Renato Cellini.
Tajo can be heard in live broadcasts of Macbeth, opposite Maria Callas, conducted by Victor de Sabata; and the Florence War and Peace.
In the late 1940s, Tajo appeared in film versions of The Barber of Seville, L'elisir d'amore, and Lucia di Lammermoor, as well as in television productions such as Don Pasquale in 1955, released as a Hardy Classic Video (DVD).