Not sure if all of these were in the 70's but I think so.
Simon & Garfunkel-Homeward Bound, Cecilia
Pink Floyd-Any; I know Learning to Fly was an 80's song but it was still great.
Rolling Stones-Sympathy for the Devil, Paint it Black, Beast of Burden, others
Kansas-Carry on Wayward Son, Dust in the Wind
Lynyrd Skynyrd-Especially Tuesday's Gone(my favorite of theirs) and Simple Man
Little River Band-Lonesome Loser
Blue Oyster Cult
Steve Miller Band
Traffic-Dear Mr. Fantasy
Gary Wright-Dream Weaver(Guilty pleasure/kinda cheesy)
Marshall Tucker Band
Gladys Knight-Midnight Train to Georgia
Alive and Kicking-Tighter and Tighter
Bob Dylan-Knockin on Heaven's Door
The Guess Who
Queen-Anything. Freddy Mercury is a legend
That's all I can think of right now just running through my ipod.