i would say ramanad sagar is best director o bollywood.
his film ghunghat in60 was a big hit. and it also show his talent of directing.
zindagi64,arzoo 65,geet70 are his best movies of all time.all these films lead role played by rajendra kumar.great kumar.
ankhein is his most successful film. dharmendra is hero of the film.ramanand sagar won filmffare award for that film.
main thing is the music of his films.all of his films are great musicalls .