what are the healthiest foods, super foods with benefits for you body and general health?

i want to rewally start looking after my body and look better because my diet is so crappy.

what are the best foods, that have good health benefits and nourish your body?

i eat a lot of avocados, i love them, and strawberrys and blueberries and any fruits really but is there any other superfoods you know of??

what about peanut butter? is that healthy?