if anyone could I'd say Dwight howard could, remember that dunk he threw down in practices for Team Usa in the summer? bounced it off the floor and was literally so high he threw the ball through essentially.
I dont think Kareem could. I only say that because I read a quote from Kareem after he watched some guy do it(Dont remember if it was Wilt, Earl the Goat, or Jackie Johnson) and saying he couldnt get that high.
Larry Nance id bet anything could have. Him, Kemp, G, and Travis Outlaw I figure could. Also Ralph Sampson. 7'4'' with a 34 inch standing vertical. Running I figure at least 38. And he had long arms too.
I really doubt it, I can touch the top of the square, but thats and a foot off from the top of the backboard. You'd have too be tall and still have a ridiculous vertical to be able to do this, but maybe someone can