Graduations are about the students. I can’t remember any graduation speakers from any event that I attended with the exception of Gore when he spoke at West Point a few years ago. And the only reason I remember him was for the negative remarks that spread through the stands.
Graduation speakers represent a perfunctory institution that you just have to suffer through. Maybe there are some good ones but I’ve never experienced that. Just a lot of totally forgettable ones.
When I graduated we had the former president of the school speak, the next year’s class had then president GWB.