Eric Keibler is an advisory board member of IANTD, and has been teaching tech in Houston longer than all but one guy. You can find him at Oceanic Ventures on Bissonet. Go in and meet him and see if his style matches yours. Chuck Noe has been a cave diver for a hundred years, and teaching about that long. He runs Airtex in Houston. He may not be taking students any longer. He is very cave oriented, and may not teach wreck, or anything salty. Tom Anderson owns and teaches at Island Divers in Galveston. He's been diving and teaching as long as I was in Houston (about 15 years) for The Ocean Corp. He teaches mixed gas to commercial divers. He has access to some of the big wrecks in the world that it is otherwise hard to get access to.
Your best bet is to go meet the guys at CHUM, the City of Houston Underwater Mariners at their meetings third Thursday of the month at the Stag's Head. Many of them are tech divers, and they all have definite opinions about Houston shops. I did not pursue my tech training in Houston, I went someplace where they tech dive. That would be South Florida or Florida (or Mexico) Cave country, depending on your desires and wishes. Doing your AN/DP/Normoxic training in Lake Travis is silly, a waste of time, and doesn't prepare you for any real world diving, unless you plan on diving a pecan grove for the rest of your life.
Not to forget - Carl Griffing. Carl teaches out of Maximum Scuba, which is somewhere, Webster, maybe? They opened after I left. Anyway, I don't know if I'd call Carl "Elite", but I don't really know what you mean by elite, anyway. Carl is a good solid instructor and is very prolific. That means, you won't be waiting forever for a colass, one should be starting just about when you are ready to take it. Carl teaches mainly in Florida cave country, so if it's wrecks and salty water you are interested in, he can easily get with you on the Oriskany.