Steven Stryker. His dad is Jon Stryker.
WMU's medical school is named after his great grandfather. I was wrong, it was actually Jon Stryker's sister who provided the $100 million gift to name the med school. But Jon has donated at least $5 million (combined) to WMU, a school he didn't attend.
There's also a $550 million anonymous donation to WMU that is rumored to be from the Stryker family.