I've not had but intriguing... will have to try. Beer batter or breaded?
And I'll offer up my regular gotos, the Perrytowne Tavern (beer batter) and TBones in Wexford (breaded).
The most legendary I recall from my youth was an obscure place called King's just over the Ohio border called Brookfield (?) near Pulaski twp. Frighteningly large portions and twice fried if I recall. I had buddies that went to college near there and we'd make road trips there, there was a convenience store next to it that sold 6 packs to anyone who could pay for em, and then the fish sammies... oh, the pleasure, oh the pain later...