I'm a bit biased, but I'd recommend giving Scala a try. There is a lot of non-sense floating on the internet about the language, but I suggest making up your ow

I'm a bit biased, but I'd recommend giving Scala a try. There is a lot of non-sense floating on the internet about the language, but I suggest making up your own mind. Tooling and IDE support is better than Haskell and Clojure, so you can focus on the language instead of fighting with tools. If you know Scala a bit, it's easy to move to something else. For instance, if you decide that you don't need types, you can move to Clojure; if you decide you don't need unchecked side-effects you can move to Haskell; if you decide that you don't need functional programming, you can move to a different OOP language (or keep using Scala).