Probably bananas. Though, it's hard to find perfect ones. If they're even a little early or a little late, it takes away from my enjoyment. I also like grapes, but they always have a few that are really sour and really gross. Though that's only with purple grapes, I don't think I've ever had that experience with green ones.
It would have to be grapes or strawberries. Strawberries and cream are a personal favourite of mine and just amazing to have in the warmer months of the year
Apple with the skin because apple is full of good antioxidants to prevent cancer and al other nasty stuff, good for gut health, really low on phosphorus, good for the skin, good source of fiber, high source of pectin which is good for kidney health, and improves blood sugar and blood fat levels.
Strawberries is at the top of my list, June is my second favorite month thanks to that. Followed by Watermelon and then grapes and then apples, which funny enough is their season in that order lol.