in reply to what are some of the most powerful, complex, one-liners?

Just pick the most powerful module you know and invoke it as a one-liner. Just for one (not real great) example: Maypole::HTTPD: 

perl -MMaypole::HTTPD -e 'Maypole::HTTPD->new(module=>"BeerDB")->run()
+'

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I reckon we are the only monastery ever to have a dungeon stuffed with 16,000 zombies.

In Section Seekers of Perl Wisdom