Houston Cultural Icons?

I'm doing a little project and need to make a list of people who are Houston cultural icons. I'm gonna narrow it down to 4 or 5, let me know if there's anyone I should add or remove.

In no particular order: • Mattress Mack • Joel Osteen • DJ Screw • Paul Wall • Johnny Dang • Dave Ward • Hakeem Olajuwon • Jeff Bagwell • JJ Watt