You can try any model you want, however I really suggest using AutismMix Checkpoint or Hassaku XL Checkpoint.

Base model settings:

• Steps: <30

• Width: 896px

• Height: 1132px

• Sampler: Euler a

• VAE: None

• CFG Scale: 3 - 5

• Clip skip: 2

Upscaler settings:

• Upscaler: Latent (Nearest-Exact)

• Upscale by: 1.5x

• Denoising strength: 0.55

LoRA settings:

• Weight: 0.7 - 1.0