First, note that rosemary is easily a perennial in Texas and can become a robust shrub large enough to merit it's own barrel half or space in the ground. Similarly, sage will become quite large, although mine tends to get a little leggy. It has, however, outgrown the rosemary and has taken over a barrel size planter.
Most other herbs are annuals here, either going to seed or freezing. There are many varieties of basil. Classic Italian basil and lemon basil or Thai basil are different enough from each other to be worth keeping them all. I keep my convenient herbs in two self-watering planters, each about two feet diameter. Because of the large water reservoir in the bottom half of the planter (originally a stock tank), the plants get some protection against freezing.
I mix up the herbs for visual effect. Thyme does fine growing low under the edges of sage, with chives around the edges of the planter. Consider a mint.
Consider starting the rosemary in the planter and later moving it out to it's own planter or ground space. Also, pinch back the heads as basil and others start to bloom to extend their useful lives.
