That seems fairly reductive for such a wide breadth of work and influence, especially given the context that the US is and always has been essentially a two-party system. In such a system you’re either one, the other, or irrelevant.
Chomsky still telling people to strategically vote for Democrats vs. starting a new party (like the People's Party[0], a populist-focused, anti-corporate party) is pretty inexcusable, though, but that's beside the point.
If you like Bill Hicks' far left view, you might like Jimmy Dore [1], too. Though he's more of a "pothead club comedian".