One that's more than just anti authoritarian but has it as one of the many societal issues it deals with would be Transmetropolitan. The pitch: Hunter s. Thompson in a cyberpunk future. Kicks against many a shin that needs kicking. It's one of my favorite works, not just in comics but in general. Some of the political aspects are eerily prescient, it's got style in spades, it actually deals with issues rather than using it as set dressing. It's got character and (so long as you read the protagonist as a fuckhead that's mostly along the right lines, which you should) a good moral compass.
One strong counterrecommendation of it: the author (Warren Ellis) may have made many great works, but the guy is/was a sex pest. It's not something I could in good conscience leave unsaid. It's the reason I didn't buy a physical copy of anything but the first chapter, and the reason I recommend it to people way less these days.