Randal "Randy" Marsh is Stan's father and as a geologist he's surprisingly involved in a lot of the plotlines in South Park.   Randy has also been revealed to have a decent singing voice, having been involved in a boy band as a kid, and knows how to play the guitar.

Randy Marsh Quotes

Randy: How does it feel to be a hundred and two, Paps?
Grandpa: Shoot me!
Sharon: Make a wish, Grandpa...
Grandpa: I wish I were dead!
Randy: That's our silly Grandpa!
Grandpa: I'm not kidding, God Dammit! I really want to die!

Randy Marsh: I think I'm getting that stomach flu you gave me.
Mr. Garrison: It's that little Kenny bastard that gave it to me.
(the mayor exits the porta-potty)
Randy: Hey, mayor. Were you making gravy in there?
Mayor: I just gave birth to a brown baby boy.

South Park Quotes

Chinpokomon Executive: You are American.
South Park Toy Store Owner: Yes.
Chinpokomon Executive: Ohhh, you must have very big penis!
South Park Toy Store Owner: Excuse me, I was just asking you what your up to with these toys.
Chinpokomon Executive: Nothing, we are very simple people with very small penis. Mr. Hosik's penis is especially small!
Mr. Hosik: So small.
Chinpokomon Executive: We cannot achieve so much with such small penis, but you American wow, penis so big, so big penis!
South Park Toy Store Owner: Well aah I guess it is pretty good size.

James Cameron doesn't do what James Cameron does for James Cameron. James Cameron does what James Cameron does because James Cameron is James Cameron!

James Cameron