I just finished up volume 8 of Atomic Robo and it continues to perplex me how it’s not more popular than it is.
In a nutshell, Atomic Robo, the world’s first “automatic intelligence” was created by Tesla in the 1920’s. Because he’s continually upgraded himself over time, his various adventures have covered a span of time from his creation to the present day (secret WWII & NASA projects included). Since 1943, he’s been in charge of Tesladyne Industries and it’s elite group of Action Scientists, dedicated to combat weirdness around the globe.
You can read the first issue of Volume One (“Atomic Robo & the Fightin’ Scientists of Tesladyne”) as well as a bunch of other one-offs and their entire selection of “Free Comic Book Day” issues at the link above.