As to ‘uncooked baked beans’ - no doubt there are many. I suspect the intended answer is Rorschach, simply because it was a memorable scene.
21 (ok, 25, then) LITERALLY anything and everything. Has a special fondness for gemstones. Occasionally eats inconvenient papers. (Primarily comic book character, has had a handful of TV appearances.)
These two eat almost exclusively from diners and fast food places, though one of them will also gobble up anything that’s around and will drink besides.
#2, 3, and 4 from the OP were also answered correctly.
29.: These two ate mostly nachos and anything from a vending machine, as well as burritos if they could get them. Just junk. And they watched a ton of TV.