O'Jays:

#28 Forever mine 1980

Ollie and Jerry:

#9 Breakin'...there's no stoppin' us 1984

Alexander O'Neal:

#26 Saturday love (with Cherelle) 1986
#25 Fake 1987
#28 Never knew love like this (with Cherelle) 1988

One 2 Many:

#37 Downtown 1989

Opus:

#32 Live is life 1986

Roy Orbison:

#9 You got it 1989

Orchestral Manoeuvers in the Dark (OMD):

#26 So in love 1985
#4 If you leave 1986
#19 (Forever) live and die 1986
#16 Dreaming 1988

Benjamin Orr:

#24 Stay the night 1987

Robert Ellis Orall:

#32 I couldn't say no (with Carlene Carter) 1983

Jeffrey Osborne:

#39 I really don't need no light 1982
#29 On the wings of love 1982
#25 Don't you get so mad 19883
#30 Stay with me tonight 1984
#40 The last time I made love (with Joyce Kennedy) 1984
#38 The borderlines 1985
#13 You should be mine (the woo woo song) 1986
#12 Love power (with Dionne Warwick) 1987