Among all players drafted by the Toronto Maple Leafs in 2008, identify the player with the highest prospects for the draft.
players refers to PlayerName; drafted by the Toronto Maple Leafs refers to overallby = 'Toronto Maple Leafs'; highest prospects for the draft refers to MAX(CSS_rank);
SELECT PlayerName FROM PlayerInfo WHERE overallby = 'Toronto Maple Leafs' AND draftyear = '2008' ORDER BY CSS_rank DESC LIMIT 1