Sinwar, the guy who decided "How about we attack Israel really bad for once instead of a few missiles that just get shot down" might legitimately go down in history as the most influential figure of modern times.
That one decision was enough for everyone to go "Right, that's enough. Islam has to go". Hezbullah would still be around, Palestine would still be allowed to do their token 10 missiles at Israel every quarter, Iran would be relatively untouched. This one guy basically disrupted the entire Islamist gravy train and saw the entire world just root on the destruction of everything.