Funny how things can change in a hurry in sports. It was only a few years back Osaka might have been the hardest hitting player in tennis with a couple US Open titles. Now it looks like she's on the outside looking in. Sabalenka and Anesimova hit harder, and then there's the consistency of Sviatek as well as Pegula who hits a very clean and deep ball.
On the mens, Sinner and Alcaraz probably hit the ball harder than the Big 3, though that does not necessarily mean they will win more title. The Big 3 have 66 titles between them LOL.