I've been looking for a good painterly/illustrative mix and gave this LoRA a try.

It works well with the official checkpoint, other checkpoints/mixes seemed to over-bake this particular style.

Useful descriptors helped to bring the style to life from OP's test image:
classical painting, mythological art, baroque style, detailed anatomy, draped fabric, golden tones, olive branch, snake symbol, bearded man, divine figure, dramatic composition, rich texture, oil on canvas, symbolic art, epic mood, expressive portrait, historical style, golden halo>