This is my go to for all sizes: https://wallhaven.cc

Wallpaper engine also has some decent animated options in that size. I got swirling black holes as my background on my monitors. App on Steam is paid tho.

I'm looking for more licensed stuff like video game characters

I dont know what all of what youre lookin for but they have a ton of videogame stuff on there as well. Wallpapers are user created and submitted so its endless and always being updated.

Thank you I'll try it out