Can't be sure about other film Industry but I guess in Indian films, Rajesh Khanna died in …..28 films.
Rajesh Khanna considered death scenes as his lucky charm and beloved that the films where he will die will become a success. At times he incorporated death scenes in his films.
The films where he died atleast once include:
Raaz (1967)
Aradhana (1969)
Safar (1970)
Anand (1971)
Andaz (1971)
Namak Haram (1973)
Aapki Kasam (1973)
Roti (1974)
Prem Kahani (1975)
Mehbooba (1976)
Naukri (1978)
Bhola Bhala (1978)
Amardeep (1979)
Kudrat (1981)
Dard (1981)
Disco Dancer (1982)
Avtar (1983)
Dharm aur Qanoon (1984)
Paapi Pet ka Sawal hai (1984)
Babu(1985)
Mohabbat ki Kasam (1986)
Sitapur ki Geeta (1987)
Gora (1987)
Ghar ka Chirag (1989)
Paap ka Ant (1989)
Swarg (1990)
Ghar Parivar (1991)
Pyar Zindagi hai (2001)