Best Gen AI tool for children book illustration?

In particular I’m looking for character & style consistency. Is Midjourney with —sref and —cref still the best or would you suggest alternatives?

PS: I know I know, overcrowded niche etc., and I should consider an actual illustrator (if only for their existing customer base). This is just a fun side project with the goal to launch an MVP in short time and I want to see what’s possible with AI