ThisMichael Jordan.
Current it's got to be Kieran Tierney. Played over a hundred times for Celtic, 25 European games, 2 league titles, 2 league cups and a Scottish cup, captained club and country and he's only 20. The picture below was the Scottish cup final, got his jaw broken, taken to hospital and ended up running through the away fans in his kit to get back into the stadium to lift the cup out his mind on painkillers