1973 Crocodile Rock Elton John
1972 Lean on Me Bill Withers
1978 Baby Come Back Player
1974 TSOP (The Sound of Philadelphia) MFSB
1975 Fame David Bowie
1976 Love Machine The Miracles
1977 Dont Leave Me This Way Thelma Houston
1970 Ill Be There The Jackson 5
1979 Hot Stuff Donna Summer
1971 Go Away Little Girl Donny Osmond
Man I guess I never glimmered on to the fact that Top 40 was so crappy in the '70's. I hope the choices are better when you go to brackets.
I will say I wasn’t a big fan of disco, but at least “Hot Stuff” had a decent guitar solo.