Stefano Lissa, the developer of Hyper Cache, just released a version which hooks into Autoptimize (the autoptimize_action_cachepurged action) to automatically purge the page-cache if Autoptimize’s cache gets cleared. Thanks Stefano, it’s no coincidence Hyper Cache is one of my favorite page-caching plugins!
The Gator Cache-developer is also working on a new version which will do the same by the way.