There's two categories for this one..
Most skilled "pilots"... either they are, or they aren't.
Best "pilots"... open to interpretation, best in this case for me would be the guy who is good enough to realise the guy you are on doesn't need him to tag along to pop him just as you are about to deliver the final blow, he would instead concentrate on the other guys coming in, he would turn to clear your 6 rather than going for the low and slow easy target, he goes for targets based on threat, and most of all, he won't complain if he gets killed.
-SW