JeffieBoi: Greatest American Hero!
That's the first thing that popped in my head when I saw the title. I was hoping (unrealistically) that this thread was created as a tribute to his role in that show
I didn't even know he did the voice of Breen till now. That's pretty cool.
Edit regarding the theme song that delixe and cogadh mentioned- When I was in elementary school, our class had to sing that theme song for an after school variety show/ whatchamajig, so I still know all the lyrics to that song.