Which are better at Word Formation?

What languages allow you to do more with less vocabulary? What languages make extensive use of compounding and have a highly developed morphological system?

Regarding more commonly taught languages, English is certainly less powerful, while Esperanto and Chinese are on the other end of the spectrum. But what about the others?

If there have been discussions or papers about this topic, please refer me to them. If not, could you share your hyperpolyglot insight? Thanks a lot.

Edit 1:
The question put more clearly: Is there any list of morpheme per word ratios of languages?