Homer Simpson, voiced by Dan Castellaneta, is the patriarch of The Simpsons and is definitely the main character. Homer is an overweight, slob and a terrible father, but genuinely tries hard.
Homer previously had a job as safety inspector at Mr. Burns' Nuclear Power Plant, but good luck finding out what he's been doing for a living the last few years.
Larry: What you got riding on this?
Homer: My daughter.
Larry: What a gambler!
(At Cirucit Circus.)
Homer: (to Bart) Now ignore all the fancy shmancy thingamajigs, boy. We're just gonna get a camera battery and go home.
Salesman #1: Interested in a car stereo?
Homer: No, thanks. Just here for a battery.
Salesman #2: Big special on camcorders!
Homer: All I want is a battery.
Saleswoman: Care to make love, sir?
Homer: Battery, battery, battery!