I don't know if this notable list is a Hwbot past members only but, if it is allowed, i would like to suggest a few more.
It is not because they were not members here that their nicknames cannot belong to a oc notables list, overclock is much more than hwbot era only...
Suzuike Kazuhisa, nickname "KAZ", Born in Osaka in 1957, known for many experimental extreme overclock and hardware mods since 1995, he published a book in 1998 about hardware modifications for overclock and was a hardware reviewer for a japanese website, lost his track in 2003 (from my digging extreme overclock researches couple years ago).
One article from him, published in 2001: https://translate.google.com.br/translate?hl=pt-BR&sl=auto&tl=en&u=http%3A%2F%2Fascii.jp%2Felem%2F000%2F000%2F325%2F325439%2F
His webpage: http://kazuhisa-suzuike.my.coocan.jp/