He was the official Italian voice of James Stewart as well as Cary Grant, Dean Martin and Errol Flynn.

[4] He also dubbed over the voices of John Garfield, George Raft, Richard Conte, Kirk Douglas, Paul Henreid, Henry Fonda, Gary Merrill, John Wayne, Arthur Kennedy, William Holden and many more.

He has also dubbed over Italian actors such as Vittorio Gassman, Luciano Tajoli and Pietro Germi.

De Angelis was considered to be among the most influential voice dubbers employed with the Cooperativa Doppiatori Cinematografici along with Emilio Cigoli, Lydia Simoneschi, Lauro Gazzolo, Carlo Romano, Giulio Panicali, Stefano Sibaldi, Bruno Persa and more.

He also had three grandchildren: Vittorio De Angelis (1962–2015; via Manlio), Eleonora De Angelis (born 1967; via Manlio) and Massimiliano Virgilii (born 1967; via Paola) who are all voice actors.