/aco/ is literally, objectively superior for threads like this. Here's why.
These threads are almost always filled with reposts of the exact same images every time they're made. This is due to the fact that /co/ is a work safe board with it's subject matter restricted to just comics and cartoons, as a result, the variety pool of images that are allowed to be posted is quite shallow. Whereas on /aco/, you have the ability to post both SFW & NSFW images, furthermore /aco/ allows images of subject material from a wider variety of different media so long as they are of Western origin, this includes comics and cartoons, video games, original characters, etc. This allows things to stay more fresh and therefore more enjoyable.
/aco/ was also made for this exact purpose in the first place, so both /co/ and /aco/ would be better off if you made these threads there instead of here.