That should really be F*&K Yeah! Victor Ambrus — one of the liveliest and most versatile kids book illustrators of the last 40 years. At age 75 he’s appeared on TIME TEAM as the archaeological illustrator who reimagines how people lived in the past.
And draws stegosauruses.
The Ambrus website does not have all the tons of meaty illustrations one might hope for, but it is still worthy of exploration.