How silly are you looking for? It doesn’t get sillier than We Ran Out Of CD Space by PsychoStick… or anything else by psychostick. But there’s also Ninja Sex Party, Wolves of Glendale, First of October (listen to Ravioli).
While not outright comedy, there’s a humor to Falling for Me by Parker the Bandit and It’s Okay to Punch Nazis by Cheap Perfume