[potkin]

Wittgenstein Russell and Frege were really the founders of "analytic" philosophy as a field or set of methods. Since their time philosophy has become increasingly specialised and I don't think there are contemporary equivalents. So much philosophy of [X] but whether or not that work is seen as serious by practitioners of [X] is debatable.

Robert Brandom at Pittsburgh is a bit of a grand old man of philosophy and still publishing - works in in philosophy of language and philosophy of logic as well as Hegel scholarship, and his "inferentialist" approach to linguistic meaning has been at least cited by people working in proof-theoretic semantics and linguistics. Martha Nussbaum in political philosophy and ethics and David Chalmers in philosophy of mind/cognitive science also come to mind. But again I'm not sure that Chalmers is taken seriously outside of philosophers' circles.