We debated Ayn Rand’s importance in the History of Philosophy earlier this century.
2007:
And back in 2002, a poster asked What contribution, if any, did Ayn Rand make to philosophy? The poster AynRandLover and the poster Libertarian seemed to think it was substantial. (The first would later change his handle to erislover; the second changed his username to Liberal. I was going by the name flowbark at the time, a name picked at random.)