Having been on the SHL now for quite a long time, too long, longer than most on the site but still not OG level long i've seen plenty of people pass through the SHL and make big impacts whether it be to the league as a whole or to me personally.  While I can't comment on the people who may have had huge or bigger impacts in the 12 seasons of SHL prior to be joining here are some that i've found to have a big impact on SHL becoming what it is today and be worthy of the SHL Mt Rushmore

@Wadester/@Wadeyb/@WADDY
One of the main first commish's when I first joined SHL, he had a more unique commishing style compared to most but I think it was very effective and he did a lot of great things while running the league

@xDParK
Another former commish, park had a mastery of not actually doing anything but making it seem like he was doing things and keeping everyone happy, now this is a skill i can immensely respect. He had some great shl changing ideas that are still used today, but more importantly he was great at being able to steal others ideas and then modify them and claim them as his own, a valuable skill

@JNH @O4L
Two members that have done a lot of shit in the league, but they can take up the final two heads mainly for being responsible for the abomination/brilliance depending who you ask of the S20 class and recruitment as well as future classes. Because of this the league has been ruined/greatly improved depending who you ask and the league has massively changed because of them