Beans - so long as I wash them - much easier than fresh.
Most vegetables in a can taste better than frozen because there's more sodium. When I did eat corn, canned corn was soooo good.
I always loved chef boyardee and could stand zoodles and trout.
I loved campbell's soups too - sooo good.
Tomato paste and pre-made pizza sauce are pretty good, but I would die before I used pasta sauce from a can.