Ortolani's tunes - often stagey guitar pieces in the Spaghetti Western mould - featured in Tarantino's Inglourious Basterds, Django Unchained and Kill Bill.
The composer started out aged 20 as an orchestral arranger for Italy's state broadcaster RAI, and made the move into cinema music in the 1960s, which saw him gain entry into the Hollywood studios.
He was twice nominated for Oscars and won a clutch of other prizes, including two Golden Globes for his work.
He is survived by his wife Katyna, a singer, and their two children.
Listen to Ortolani's music from Django Unchained: