5 different constructors/drivers:
1983 - Piquet (Brabham), Watson (McLaren), Prost (Renault), Tambay (Ferrari), Rosberg (Williams)
4 different constructors/drivers:
1962 - G Hill (BRM), McLaren (Cooper), Clark (Lotus), Gurney (Porsche)
1967 - Rodriguez (Cooper), Hulme (Brabham), Clark (Lotus), Gurney (Eagle)
1970 - Brabham (Brabham), Stewart (March), Rindt (Lotus), Rodriguez (BRM)
1972 - Stewart (Tyrrell), Hulme (McLaren), Fittipaldi (Lotus), Beltoise (BRM)
2012 - Button (McLaren), Alonso (Ferrari), Rosberg (Mercedes), Vettel (Red Bull)