Patty Wagstaff / Extra 300S
Had to take a break and eat during Patty Wagstaff's routine and this is the only shot I got. Sorry.
She didn't do some of the crazy barnstorming ditch-your-aircraft-in-the-water stunts like the other guys, but hers were more demanding from a physical aspect. She flew a 360 of constant victory rolls (without losing any altitude)—which takes tremendous situational awareness, stamina and airmanship. The only problem is that most of the difficulty of these stunts would be lost on your average nonflying viewer; only pilots will know how tough they are to execute.