Aren't Garth Brooks and Vince Gill both from Tulsa?
Garth Brooks is from Tulsa. He still has a house outside of Owasso, though I understand he spends most of his time in his Nashville area residence now. My sister lives a couple miles from him and has run into him around town two or three times. A friend from high school worked at the Owasso UPS Store for several years, and Garth and Trisha had boxes there. They usually sent a courier to get their mail and parcels, but they visited the store in-person on occasion. When my friend had fallen on particularly hard times, someone showed up at the UPS Store, asked for her, handed her more than $10,000 in cash and walked out without saying another word. She never was told who the gift was from, but we're almost certain it was Garth Brooks.
Vince Gill is from Oklahoma, but I don't believe he's from Tulsa. I did meet him in Tulsa several years ago at Roy Clark's funeral, and I understand he has been coming back to Oklahoma more often. I want to say he and Reba McEntire are from the same area, though not exactly the same towns. Blake Shelton is also from that area. If you drive the most common route between Tulsa and Dallas, you'll go through their hometowns.
Roy Clark was from the Washington, DC area but moved to Tulsa early in his career because he could get to Nashville, Las Vegas, and DC quickly from there. He was also the person who made Branson year round. He could get there quickly, too, and didn't even have to fly. Christian singer Carman also lived in Tulsa for at least part of his career and moved there for some of the same reasons. I suspect, however, that the evangelical connection brought him there, too. Nearly every major evangelist from the 80's had Tulsa connections in one form or another.
As Stan mentions, Tulsa has had its share of rock musicians. Leon Russell and Elvin Bishop grew up there. They went to high school together. They were also briefly in a band together with another of their classmates, David Gates. Dwight Twilley was from there, too. The "Tulsa Sound" was something you might've heard on rock stations in the 70's and early-to-mid 80's. That was usually referring to Russell, Twilley, and a few others. As I mentioned earlier, Steven Tyler used to have a place in Tulsa when he was with Teresa Barrick, though they spent most of their time in Boston. Not sure if I could still remember, but I used to know how to get to his house in town. You couldn't see much of it from the road, but it was gated and walled with a "T" on the gate. I've been told Jack White has a house in Tulsa now as well, though I don't believe it's his primary residence.