Luke was a great pilot, an innocent naive farmboy attitude, but he also had the force and his father's lightsaber. Was he the best pilot in the Rebellion? probably not, but he was good enough to lead Rogue Squadron.
That would be Wedge.
*sarcasum* Yea, Mr "Look at the size of that thing!", the guy who lost ONE of his FOUR engines during the battle of Yavin and had to bail on Luke. Didn't even get a medal at the ceremony and a chance to freely closely look directly down at Liea's boobs
Put it this way at the Battle of Yavin Luke took a hit from TIE pilot Minon #3 and had to have Wedge bail him out. Wedge took a hit from Darth Vader, lost an engine, and only pulled out because Luke ordered him too do so.
Now lets look at the Battle of Hoth Luke gets shot down before he can bring down a walker while Wedge brings down a walker and survives the battle with his speeder intact.
Though I think Lando could probably outfly Wedge the way e had the Falcon flying at Endor, The tunnel run especially.