Baylor is #1 in Texas followed closely by UT-Southwestern
The others aren't ranked, but based on average GPA/MCAT it would seem:
1. Baylor
2. UT-Southwestern
(gargantuan gap in quality)
3. UT-Houston
4. Texas A&M
5. Texas Tech
6. UT-Galveston
7. UT-San Antonio
Also for 3-7, as you might see, they are all pretty close together and are all unranked by US News. Furthermore, many of these schools dont' report all their stats.
I would be interested to hear other people's rankings, however subjective, on this topic (my above post is relatively subjective, as it deals with MCAT/GPA only, and for some schools the stats for all aren't even posted).