DEBATE: Who is or are the most influential Left-Wing thinkers and philosophers of the 21st Century, this debate can go in many ways and directions so i don't think there is any more explanation needed.
I think at the moment it would have to be Alexandria Ocasio-Cortez.
AOC is great as far as Democrats go, but is she really a leftist thinker? She's a politician and a change-agent for sure, but she's certainly not original.
World Assembly Delegate of the 24th Interim Cabinet, 30th Cabinet (Interim) President & World Assembly Delegate of the 21st, 22nd, 23rd, 24th, 25th, 26th, 28th, 29th Cabinets Secretary General of the 24th Interim Cabinet Minister of Role Play of the 17th, 18th, and 19th Cabinets Administrator Emeritus, 27th Cabinet
I cannot help but think of Jurgen Habermas. Although his contributions sprung up already in the early 1980s, I would say that his thoughts on universal human rights and deliberative democracy are highly valuable for the future intellectual development of the left wing.
Considering your choice for AOC personally I agree with Ivory, I do like AOC but I wouldn't say she's a great philosopher or super influential, though I hope to see more of her in the future.
Why Beto though, to call him left-wing is incorrect, if you look at his record you will see him being a part of the New Democrats, a centrist democratic coalition, his first day fundraising was very shady, didn't want to bring out how many individual donors there were so some big donor money might have been involved. He has been spitting platitudes and done some bad things with fracking I think. Here's a link: www.theguardian.com/us-news/2018/dec/20/beto-orourke-congressional-votes-analysis-capital-and-main
I'd unironically say Zizek. He's super influential because of how popular he is, how he relates his points to jokes and popular culture, and how broad the area of inquiry he's interested in is. His understanding of ideology was prefigurative for other important 21st century thinkers like Fisher. I'm taking "thinker" here to mean something like "theorist", which excludes the likes of Ocasio-Cortez, who has surely been an influential voice on the left in recent months.