I subsisted for several of my late teen years on bananas, Pepsi, and the occasional Reese cup (not really, but closer than anyone should have), so ... what was the problem again? Oh, yeah, we're all grown up now, right, right.
I'd readily add to your list apples, oranges (and variations thereof -- the clementine, the satsuma...), pears. Cucumbers (+ a knife for slicing). Celery or bagels with cream cheese. Hard boiled eggs, yogurt -- both will keep @ room temp for a day, easy (if it is summertime heat and you have to leave them in the vehicle, or out, then ... no. Crackers, chips, pretzels. Cheese of all sorts though only if it can be kept cool (won't go bad that fast but I don't like the way it gets rubbery when warm). Anchovies in a tin (hey, you wanted variety ;) ). Sliced peppers (again, should be fine at room temp, don't keep well when hot). Grapes (ditto). Cherry tomatoes, plain, or sliced tomatoes in a vinaigrette (or not). Good bread (the crusty stuff, or pita), with hummus (again, enough for the day, assuming room temp).