IMO you require the services of a landscape architect to start with in order to fix this huge expanse of stone. Maybe create an outdoor kitchen, create an area of sun control, establish some built in tree planters, create a plan for outdoor landscape lighting.

Then I would not recommend overstuffed Tuscan furniture. Hard to maintain and dated. No one in Tuscany has overstuffed furniture.

I would also have the stone pressure washed and sealed. The color will change considerably.

It's a beautiful place so obviously budget is not an issue, get a designer who specializes in outdoor living and he will help you do that place up to your liking, i.e Put some outdoor furniture, grill area, eating area, sunbathing area... some pots with plants, some trellises,etc

Check on outdoor collections from Restoration Hardware, Brown Jordan & Tropitone. See if you can select at least a few styles you would consider.

The major elements for a Spanish style and feel are gardens, courtyards, fountains,etc

You need a combination of some garden area and create an intimate patio area which can be separated by a wall with a nice impressive fountain and have a nice view of the garden area on the side.

Add a mixture of colors like brilliant blue, baked terra cotta, classic brown, white, all this colors are very popular today.

If you use furniture with cloth you can use pacific blue, or kamal chestnut.

Best of luck

My husband is built like an offensive lineman, so I get where he is coming from. A lot of the furniture has such short backs that it is not comfortable for them. The O.W. Lee Monterra collection is pretty comfortable for the football player types. (They have some other collections that I liked a little better.)

What about some large, modern planters to add some color and interest? We have a wide selection on Urbilis!