Scala also shines for this style of development. Sealed traits and case classes (algebraic data types) are a nice way to express many different types of data models, including polymorphic types and state machines (its surprising how many "hidden" state machines live in your objects via Boolean and Enum fields).

I found this book very helpful in terms of thinking in a more functional type-driven way: https://www.manning.com/books/functional-and-reactive-domain.... It does eventually get into some deeper functional programming concepts but its still a nice read and easy to get into for anyone coming from more traditional object oriented coding.