The answer is just that I haven't gotten around to trying Racket. I've eyed it now and then but I've never done anything serious with it. It does seem to be the closest match for me barring Clojure.
That said, the JVM is a huge part of why I like Clojure. Because of the mountains of corporate code written in Java there is an insane amount of pretty high quality (if extremely object oriented) code available for it. I can find a library for basically any third party tool I'd want to use and if someone hasn't written a Clojure wrapper for it yet I can whip one up pretty quickly most of the time.