TheKenWord and Carcharodon assembled these Top Ten(ish) lists and apparently they stand by them. You can judge if that is the right decision.
Eximperituserqethhzebibšiptugakkathšulweliarzaxułum
Eximperituserqethhzebibšiptugakkathšulweliarzaxułum – Šahrartu Review
“…or Eximperitus for short. What’s in a name, anyway? For the nameless, faceless Belarusian purveyors of brutscurity, it contains fragments of Latin, Ancient Egyptian, Akkadian, and Sumerian to form the ‘unutterable name of the antiuniverse.’ Sold. Let’s fucking go.” Names fail us.