Optimus Prime: Right-winger, mostly libertarian but with some conservative values. War is the solution! Voted for Reagan and cried at his funeral.
The Smurfs: Communists. Duh...
Inspector Gadget: Conservative. Holds zero sympathy for law breakers.
The entire Scooby gang other than Scrappy: Left-wingers. Velma is a militant feminist and Marxist, Fred and Daphne are actually just yuppies who call themselves "hippies" because they think its trendy, and Shaggy and Scooby are just in it for the weed.
Scrappy Doo: Extremely right-wing, which of course just makes the rest of the gang even more annoyed with him. Is a fan of Nixon and wants to turn Iran into a parking lot.
Every character on South Park: Closet-conservatives. They call themselves libertarians, but in the end, they do want to keep marriage a thing between a man and a woman.
Every character on The Simpsons: Left-leaning liberals; they just dont always realize that they are (except Lisa, of course). But living in a universe where right-wing politics are objectively the source of all evil, they all do have a little lift-winger embeded somewhere in their hearts, however hard he may be to find sometimes.