I think the story of Hans-Ulrich Rudel (THE Stuka pilot) is most impressive:
Rudel flew 2530 combat missions and successfully attacked many tanks, trains, ships and other ground targets, claiming a total of 2000 targets destroyed - including 519 tanks, a battleship, two cruisers and a destroyer. Neither cruiser sinking however is confirmed by Russian records; smaller warships may have been the actual targets. He also shot down 9 aircraft
AA