Chomsky? He is something of a bellwether for specious reasoning, which is a contribution of sorts. The obviously inconsistent logic of the various beliefs he holds makes his philosophy, such as it is, seem disjointed and arbitrary.
As a philosopher, he plays a "crazy uncle" character.
Chomsky's beliefs include the following: that empirical research has no place in linguistics, that linguistic problems should be solved by expert intuition, that biology is inapplicable to linguistics and psychology, and that language did not evolve. All this and more can be found in his collection of papers "New Horizons in the Study of Language and Mind." I don't think people realise how far his work is from the cognitive revolution he is credited with having founded.
Those interested in philosophy might wonder: Who are the favorite philosophers of someone (like me) who has a very low opinion of philosophy?
Well, ask no longer. Here are some of my favorite philosophers: