A quick glance at the list, and he’s ~10th in most test wickets for a finger spinnerHis record isn't actually very good look at it
He takes wickets 6 worse than Lyon and 4 worse that Vettori of non Asian spinners. And 8 worse than Swann. He averages 3 wickets a test
is he an all time great? Course not, no one would ever suggest that. He feels unfulfilled potential potential with the bat particularly. But his record is pretty decent