I believe Ollie should be a competent enough fighter. Not at Batman's levels or not even Dinah's but he should be skilled.
People often forget that archery is an extremely complex art by itself and becoming an expert of it automatically developes your strength, speed and precision so Ollie being the World's Greatest Archer should make him easily above an average fighter.
I believe Winick did good with that aspect during his run but I'm not necessarily claiming for such an overly-efficient Ollie to return.