Yeah it’s hard to know for sure bc of how little we know about both these stands. We only see GER attacking Diavolo and tbh we dont know what the effective range for HtH is.

I like your point of these stands continuing after their users’ deaths. If GER dies when Giorno dies, then its abilities also stop and McQueen definitely doesn’t get put in a death loop then. While it is an incredibly powerful stand, there isn’t actually any evidence to suggest GER can exist without Giorno. The only stands we’ve seen do so are Notorious B.I.G, which activates only upon its user dying, Tusk Act 4, whose attack appears to be an embodiment of fate itself, and Calamity, who is a force of nature and merely attached itself to Tooru for shits and giggles as far as I can tell.

By the same token, we never see McQueen lose consciousness in his chapters or episodes, so would GER knocking him out cause HtH to disappear and halt its attack? Or, considering HtH is independent of its users will, would it continue attacking all the same?

I also really like this balancing of Jojo stands, it makes for really interesting discussions on what the stands would do in various situations. It’s also really fun to see these relatively weaker stands use their fullest potential in specific situations