Specific zone advice please

I have zero gardening experience. I'd like to plant something to hide two ugly tree stumps I'm in zone 8b.
Stump measuring 4" above ground & 18" diameter. The stumps have many roots near ground level, I'm wondering if the stump roots will make it difficult for a flower to grow?
I need something hardy because our weather runs from drought to heavy rain, luckily the soil is sand so no flooding but probably lousy for planting. Summer temps are in the 90's occasionally 100+, nightime lows usually in the 70's. The stumps are in full sun. I'd appreciate any suggestions how to hide these ugly stumps.
In summary
zone 8b
no gardening experience
goal is hiding tree stumps
hardy flower
sandy soil
hot summers

full sun

I have a couple of ideas for you.
1. Buy a big pot and set it on top of the stump, plant a "Blue Dawnflower" or another somewhat invasive vine in it.
2. Hire someone to dig out the center of the trunk to make it a pot and then plant it.
3. Dig around near the stump and see if you can get a plant stuck it next to it.

Do you have any idea what sort of tree it was? Some are more toxic than others, and another plant might not do well until the stump has aged a while.

How much room is there around the stumps?
What else is near by?

Most shrubs will grow about as wide as they grow tall, so something that grows about 4' wide, planted on one side of the stump, would hide it, without getting into invasive vines. Or 2 plants that get about 3' wide, one on each side of it. Depends on how close you can plant without getting into too many roots.

Another thought:
Plants grow pretty well, even from small pots. If you can only manage to dig a small hole because of the roots, but you know there is soil under there, then plant a small plant that will grow bigger. You will have to take good care of it through the summer heat.

Another thought: bring in enough soil and compost to make a mound and hide the stump. Plant the mound.

Coral Honeysuckle Vine or other wildflowers might be nice.

Thanks for the suggestions everyone! I'm leaning toward buying a few shrubs to hide the stumps.
I had a large holly tree in the front yard last year. I cut it down to a stump then let the holly regrow to a 1' bush rather than the 15' tree it was. The stump is completely hidden by the growth of the holly bush.
The stumps in the back yard aren't showing any green regrowth, I have no idea what they were.

I think a better behaved shrub would cover the stump better, and less maintenance than a vine.

There is a product on the market either on line or from Garden Stores/departments to buy and it is supposed to help KILL off the stumps by rotting them away.

You need to drill long and fat/ wide holes into the stumps, maybe about 4-6 inches apart, then you insert the stump clear / killer into these holes, try melt a candle to plug the holes up and cover the stumps with a THICK plastic sheeting, the plastic is to prevent any birds or other animals from pecking the holes and getting poisoned and also to prevent the open wounds and the CUT area from getting moisture onto the wounds. ( melt the candle wax in a container away from the product as maybe a naked flame is not advisable, read instructions carefully.

I know it works as friends have successfully used this method in their front garden BUT, it does take a good long time, AND several refills of the drilled holes, the reason for the use of these products is normally because of lack of space for the heavy mechanical stump crushing machines. and the hire of the guy to use it for you BUT, these machines do a really good job quickly. and they allow you to clear the tree root area fast.

After you securely tie the heavy duty plastic over the stump and packed holes, either use those strong elastic luggage belt / ties to make sure the plastic cant be blown or washed away, you can then use a tray, shelf, wire container Or even plastic basket type you get in grocery store, line this container with woven fabric, plastic sheeting or whatever and fill with soil to plant up, when you water the plants, the stump wont get any water, Good idea the drill and fill any large roots that your able to see that have spread out from the trunk, these on certain trees can send up little new green shoots though NOT so little after a year or so depending on the tree type.
USE GLOVES when working with ANY type of killers.
Hope this gives you some other ideas.
Kindest Regards.
WeeNel.

When we moved into our house, we had two large trees removed. The one was already rotting, hence the removal due to death but the other was a healthy tree with a 3' diameter trunk. I dug out as much soil from around the roots as possible then took a chain saw and cut the stump as low to the ground as I could. After that, I unloaded 2 yards of topsoil around the trunk and surrounding roots with grass planted on top. After a few years, they stump rots and the soil mound shrinks a little. You should have at least 2" over stump and roots to grow grass. It worked great for me. Now I have a huge garden over the area where the stump and roots once were.