Most of them have this as a base: portrait, white background, fantasy art, dishonored style --ar 2:3 --v 5.1

Two of them (Baeth and Father Del) use this as a base: portrait, white background, medieval, fantasy art, Donato Giancola, craig mullins, parth, masterful strokes --ar 2:3 --v 5.1

Beyond that, I tend to use basic descriptions and generate until something clicks. With two of those, I had to use actors because my prompts didn't return anything I liked. For instance, the nobleman at the bottom, Caundry Aborlein, uses William Powell as a descriptor. I had to Photoshop the mustache on him, however. Here's his prompt: nobleman, curly shoulder length brown hair, William Powell, arrogant expression, large nose, fat face, fancy clothes, portrait, white background, fantasy art, dishonored style --v 5.1