I'm partial to the Scream of Wheat. It's a title that's rarely been sketched. Is it by Steven Potter?
I had to look up one of his returns on ebay to check what his signature looks like, and yes, the Scream of Wheat is by Steve Potter. It's very nicely done, looks like color pencil. He also did the four panel Wacky wrapper, which looks like marker, and the Brute 88.
Definitely a good mix of artists!