Taco or BLT from Happy Joe's. After that, just about anything from Harris' Pizza (or one of its clones) in the Quad Cities.
The pizza here in Detroit so far is meh.
Try Buddy's, the original location if it is still around. Scary locale, but great square pizza. Grew up in a suburb and that was my parent's favorite place. I was back in 2000 and it tasted the same.