the folks i consider the original illegalists (or at least who've i heard of) are the people commonly known as the bonnot gang, in paris. as i recall they gave a lot of money away to projects that they supported. and i think plenty of other people of the same ilk did too (https://theanarchistlibrary.org/library/marius-jacob-why-i-was-a-burglar,
since most anarchists i know mostly try to just ignore the law, illegalism isn't i think a label they'd embrace. probably the closest contemporary thing is anarchists who talk about criminal gangs/families, etc as having lessons to teach us. but it's also likely that illegalists aren't broadcasting their affinities, especially not online.
edit: to correct spelling of bonnot, thanks ingrate! (also, it's huye, hombre, huye)