No matter how innovative, this list is not complete without
mentioning the 1934 Chrysler Airflow.
I notice a K-Car variant right of the Airflow. The K-Cars (Aries, Reliant, 400, LeBaron) were ugly in their blandness and cheap quality. My high school buddy inherited his mom's 1982 Reliant K complete with an AM only radio and no AC. He'd step on the gas pedal and the car would let out an airy sound with some knocking and pings and we'd cruise slightly faster.
Another buddy inherited a brown 1972 4 door Dodge Coronet. Now that was one sweet car (sarcasm on).