This link https://www.google.com/url?sa=t&sou...01qCgoBKXs_BszvBQ&sig2=FH0KgmOJ2XH1RvOf1BFDog
Says that Stevenson had a 44 inch vertical.
He finished second in the dunk contest
Seems like Stevenson is the answer then. Brewer just dunked so much. I remember one year Brewer was 2nd in total dunks for the season (maybe not for the entire year, but I remember looking the stat up during a point of his best season) only behind Dwight Howard, which was insane for a perimeter player.