For Illustrious: sometimes adding "Comic \(medium\)" will bring out some more of the block shading. Examples made using Noobai model

For Pony:

Pony will give a more drawn look while Autism mix will have a cleaner look. Raw or Highres fix, Adetailer will really help bring out the faces. The model knows Batman, hulk, superman but it pulls from every iteration so its wonky, someone should make a pony character lora for male heroes.

using source_cartoon, source_western will also help.
For Flux: still testing best way to bring out the style

5th trial and the most stable, works well with character loras even some Anime ones.

7th version should get less random signature scribbles, better faces.

Recommend using Hires.fix and ADetailer to really get the style across

All examples were made with https://civarchive.com/models/108798/experimentasv specifically MKIII