>>529662190
Honestly a hugely annoying if minor problem with RT. In games with generic fantasy settings like Pathfinder, BGs or Icewind Dale you can find generic warrior, mage etc portraits everywhere and they will fit. 40k has too unique designs to fit random stuff into it so you are pretty much only confined to official GW art or explicitly 40k fanart. And then good look finding portraits to fit RT artstyle in particular. I too resorted to AI slop with RT with locally installed stable diffusion and loras. Because without loras AI generators struggle to portray 40k as well. And slop sucked anyway desu.

https://www.artstation.com/miguel_iglesias This guy used to make fanart but now paints for GW and made some great art for Darktide
https://www.artstation.com/orniris This guy paints portraits for donut steel characters. Some might be worth plundering
>inb4 Black Lion
Beyond this Russians have this site https://wh.reactor.cc/ and it has a lot of nice art and smut I haven't found anywhere else