Simplify the following text for a Grade 7 native English-speaking person.
Original: He was survived by four sons ( Saeed Rafi , Khalid Rafi , Hamid Rafi , Shahid Rafi ) , three daughters ( Parveen , Nasreen , Yasmin ) and 18 grandchildren .
Simplified: Classical and playback singer Manna Dey , who was also a contemporary of Rafi , credits Rafi as `` the best singer of them all '' . He said , `` Rafi and I could sing everything , and he was such a gentleman .