Name a DC characters that is popular only in the outside media. The character is not big name in the comics but become popular which it transit to the media.
I can list anything that are not related with the Batfamily or the Trinity characters who got popular only in the media than the print comics.
For me, Doom Patrol, Stargirl, JSA or any CW shows that are not focusing with the Batman/Superman/Wonder Woman related at all.
P.S The answer is very easy if you are comic book fan and also a movie-goers.