Is Joao Moutinho the best European player of his era never to have played in any of the big four leagues? (PL, La Liga, Bundesliga, Serie A)
Good question indeed. Other contenders off the top of my head - Marco Verratti? Blaise Matuidi? Axel Witsel? Granted Verratti will most likely end in Serie A at some point given he’s only 23.