Recommend you change the title of this post to replace "political art" to explicitly state "anticapitalist/socialist art". You're sure to get more enthusiasm that way, fellow comrade 🤝💖
And idk if they're open for comms at the moment, but the first artist that comes to mind is HearthFox (has recently done "don't kinkshame" art in goofy rubberhose/Looney Tunes style)
Other artists that come to mind that do Lefty and/or punk-rock themes: DeoTasDevil, Strype, Denucard -- they don't have "toony" styles, but they probably know someone who does