To avoid the "soldiers in a row" effect I would suggest a mixed planting. That approach also gives you more protection from a single disease wiping out your whole planting.

Most fast growing hollies (like Nellie Stevens, a Chinese holly hybrid) will exceed 6-8 feet. In fact that is the problem with "fast growing" shrubs in general - they won't stop when they hit 8 feet.

I assume you want evergreen, but you could mix in a few non-evergreens (if you follow a mixed planting approach) as well.

Evergreen ideas for full sun: upright junipers, Camellia, Otto Luyken laurel, Osmanthus (tea olive), Chindo viburnum (would need to be pruned). The Meserve hollies ('Blue Princess', for example) do seem to be considered to top out just above 8 feet, although they could grow higher.

Thanks so much for the suggestions! I have been totally overwhelmed during my search!

My planting area will be about 3 feet wide, we are fine trimming or letting the plant overhang the driveway some, but the actual planting bed will be 3 feet. Is one of these plants better for a narrow areas?

I'm going to search all the plants listed here. But earlier today I was learning towards something like skyrocket junipers with maybe a grass in-between (to avoid the soldiers in a row, or "wall" of hedge look)I'm now thinking the skyrocket is going to be too wide, though. I also like the look of skypencil holly planted close together like a house in our neighborhood has for a screen, but it looks like that one grows too slowly.