In all seriousness I feel like the common answers I saw of Diogenes (because that was like, his entire shtick) or Socrates (because they killed him for being annoying) are probably better answers but saying its Trotsky on a leftist forum is way funnier.
How I didn't think of Stirner as a contender until my friend mentioned it is honestly shockingly.
I'm sorry but Stirner is just too cool and audacious to be annoying, even Marx was tickled by the mere "existence" of the man
Now his fans who take his theories seriously on the other hand.....
Stirner would bully egoists so hard…