Since no one has answered from North Louisiana, I'll tell you what I know. I grow a few hostas in clay pots. They do not do well in the ground where I am (I know you are colder). The extra chill from being above ground seems to help. I have had success with the Patriot hosta, they have returned in their pots for several years. They also need to be dry in the winter. The Patriot offspring and ancestors are also good. I ordered some but don't recall the names. I think one of the names was Pilgrim. I researched before selecting hosta and then mailordered from reputable companies. I know the blue are the least heat friendly. There are some websites that list good hostas for Texas, which might work for you. I think Guacamole is a good one. Also, try the hosta forum here. Finally, Plant Delights is an online source for hostas. You might be able to find some varieties cheaper, but it is a good source with a lot of varieties. I ordered a few hostas from Paradise Garden, which is affiliated with Oakes Daylilies, another very good company, and I was very satisfied with the condition of the plants.

One of the good things about Plant Delights is they do a lot of research about hardiness and tell you which of their hostas will do well this far south. Much appreciated information.