I am in Georgia, 7b/8a. I only planted low maintenance fruit for my garden and can report the following have done well with nothing other than mulch and fertilizer a couple times A year:
Asian Persimmon (Makawa Jiro)- it’s a beast and consistently fruits. Third year and has maybe 20 fruit on it now.
Celeste Fig: Does ok, I have gotten fruit for the past 2 years, but does seem to die back a bit each winter so isn’t that big.
Feijao_ No winter die back. I have 2 of these. It flowered after 2 years but I was unsuccesful at the hand pollination.
Thomasville Citrangequat- Unprotected in the open. Has now fruited with maybe 8-10 fruit on a 2 year old plant. Some die back each year but does better than the fig.
Jujube- This is SO variety. Thought it was dead and dug it up and sent it to the back corner, but it recovered and has fruited for the first time. Looks like 2 or 3 fruit. I will try and move it back to a good spot this winter.
Pomegranate- This is Suhr Anor. Dies back every year but looks to have turned a corner now and is thriving and growing well.
All of these are unprotected, in the open, with no spraying.
On the South side of my house. I have a Yuzuquat that is growing decently, and a Meyer Lemon that seems impossible to kill. I almost dug the stump up, but got side tracked. It’s recovered, with no Winter protection and gave fruit last year.
The Yuzuquat and citrangequat should probably be on the South side if you’re trying citrus. I have no explanation for the Meyer Lemon which should be dead and gone…
I also planted pawpaws this year, but they are just sitting with no growth. Hope they survive the winter.
I also have wild blackberies, and I know people who grow muscadines, but both of those will require work to tame them.
Pineapple Guava and pawaws need 2 different varieties for pollination iirc… Pears also need two, so if you want a self fruitful tree, you should probably avoid them…