There was a robot character in volume 1 of Wonder Woman around issue 225. Not sure if that is too obscure. The Alpha Lanterns might also work, as would the Cyborg Superman and any other leader of the Manhunters. Also the rocket reds. Technically also the batmobile is a robot
Rick Remenders Secret Avengers introduced a race of living androids and robots called the Descendants that might be relevant to the list. They consisted of robotic 'descendants' of all human robotic creations like Visions, Doombots, Adaptoids, Sentinels etc etc.